I have installed A7Comb rom which mostly does a good job. The biggest problem is that external sdcard and usb are inaccessible. If I choose to go back to 3.01 where I had this capability, access to external sdcard is required to flash the old rom. Am I screwed or are there any other alternatives?
ooorah
im not positive, but if i remember correctly you have access to the external sd (using Root Explorer or something like it) there is /Mnt/sdcard check in there im not sure the exact directory, but im pretty sure it was in there when i was using A7comb, then you can copy and paste the update.zip to the root of the sd
Let me know if you can't find it, i will flash A7comb real quick to give you a hand
Catch-22 eLocity A7
smallba, Thanks for the reply. Can root explorer be used to do the rom flashing? I can get the 1.41 rom on the sdcard using my desktop, but the A7 can't see it. I've tried to flash using the start button routine, but it never recognizes the sdcard and sends me back to boot. Then I cant boot until I remove the sdcard. Also, even though I'm rooted and have superuser, root explorer always fc's. What a mess.
ooorah
ooorah said:
I have installed A7Comb rom which mostly does a good job. The biggest problem is that external sdcard and usb are inaccessible. If I choose to go back to 3.01 where I had this capability, access to external sdcard is required to flash the old rom. Am I screwed or are there any other alternatives?
ooorah
Click to expand...
Click to collapse
Try mnt/external_sd ..
ooorah said:
smallba, Thanks for the reply. Can root explorer be used to do the rom flashing? I can get the 1.41 rom on the sdcard using my desktop, but the A7 can't see it. I've tried to flash using the start button routine, but it never recognizes the sdcard and sends me back to boot. Then I cant boot until I remove the sdcard. Also, even though I'm rooted and have superuser, root explorer always fc's. What a mess.
ooorah
Click to expand...
Click to collapse
Do you have Sdhc adaptor physically plug the micro sdhc in the computer and then move the update zip to the sd?
What kind of sdcard are u using?
Sent from my PC36100 using XDA Premium App
Thanks for your reply. At /mnt/external_sd the sd folder is shown as empty.
ooorah
smallba I connect via usb to my desktop using a Targus adapter. The sdscard is Kingston 2gb formatted fat32. I cut/paste update.zip to the sd card.
ooorah
Do you have a cell phone to try the sd card in? I just want to make sure it is not corrupted, you have flashed before using this same sdcard?
Sent from my PC36100 using XDA Premium App
Yes I've used this sd card to flash on my Acer A500. I'm sure it's ok.
ooorah
What does it do when you put in and pull out the sdcard?
Sent from my PC36100 using XDA Premium App
When sdcard is installed I look at externai_sd and it's empty. I cannot reboot until the sdcard is removed. BTW, various mount apps I've tried fail to recognize the presence of a sdcard.
ooorah
I know I been asking many questions, but it recognized in the accer?
Sent from my PC36100 using XDA Premium App
Yes, sdcard was recognized in Acer 500. Content was shown under external sd.
A7
What rom are you trying to flash back to?
I had some issues reverting back from A7Comb.
I think I had to flash back to stock first.
Re: your previous post, how can I flash back to stock if I can't find external sd?
ooorah
Cant read SD
I reloaded my copy of A7Comb and will play around with it to see if I run into the same issue. If the SD can't be used, it may be possible to connect via USB/ADB and push the stock images.
However, I have never used ADB with the A7, only with other devices. I will also try and figure that out to see if that's a viable option. Will need to find the drivers and get those loaded. Been meaning to test ADB with this device anyway.
Thanks DANO, I'd appreciate the help.
ooorah
I'll do what I can, I'm no expert, but I am very comfortable with ADB and have no concerns about messing with my A7. I've been meaning to do this for a while anyway. Will probably take me a few days to get get the A7 connected to ADB as its USB port doesn't play nice, and there are some tricks to getting windows/ADB to pick up the device. I'm also gonna try and lookup Dexter to see if he can give me some tips on doing this.
I used ADB last March and rooted my CRUZ 7" tablet. Whether it will work with a usb connection to eLocity A7 will have to be tried. I'll play around to see if I can get it working. If I get that far I'll have to wait for further instructions.
ps I can use a usb keyboard with no problem. ooorah
Yeah, keyboards, thumb drives, etc. should all work as the A7’s USB slot is set to host mode by default. The trick is flipping the switch to slave/device mode so we can use ADB to communicate with it.
Dexter’s A7Comb Rom had an App “OTG” for doing this (with a reboot), but when I tried it out, my Windows 7 box only saw the device but still didn’t fully communicate with it (ADB didn’t see it at all). Most likely due to the lack of a driver, or rather telling it where the driver was.
I’ve got some info on doing this, and I plan on trying to get this up and going tonight. Once I get ADB connected to the A7, I would think we should be able to push a new recovery image or something along those lines to fix whatever happened with the SD Card.
Just curious, have you tried a factory reset, data wipe, etc. (then reboot back into recovery), and tried to run the update.zip from the SD Card. I doubt this will work, but the A7 re-writes the recovery image with each update, therefore if something got corrupted, perhaps a wipe will fix whatever is broken in recovery by way of re-writing it. I’m not sure if recovery gets replaced with just a data wipe/reset, but if you don’t mind resetting your device it might be worth a shot.
Related
Hi as title says I want to know how to transfer files propelry while booted into android kernel.
For example when you plug in your phone vai USB and use as card reader I can easily transfer files to and from but the problem is that when I unplug and go to view these files on phone the file system hasn't updated and I cant locate them on card.
Ive tried the unmount feature aswell as a hot reboot but nothing. Only way I can seem to do it is to power off and then boot back into android.
Is there any easier way or procedure that I need to follow?
TheATHEiST said:
Hi as title says I want to know how to transfer files propelry while booted into android kernel.
For example when you plug in your phone vai USB and use as card reader I can easily transfer files to and from but the problem is that when I unplug and go to view these files on phone the file system hasn't updated and I cant locate them on card.
Ive tried the unmount feature aswell as a hot reboot but nothing. Only way I can seem to do it is to power off and then boot back into android.
Is there any easier way or procedure that I need to follow?
Click to expand...
Click to collapse
best bet is to load the files in winmo then boot into android
Dude that wasnt my question, obviously I can do that, thats not the point.
My question was the best way to transfer files while booted into android, if it possible then obviously booting into windows and back to android every time you want to move/access files isnt the "best" way and its inconvient.
I appreciate your reply but your answer was irelivant unless its the ONLY way which I doubt (well hope)
Does anybody have a solution?
As of now, the only good way to transfer files is indeed through WinMo (or with a MicroSD USB reader, with phone powered off or in WinMo). Most Android builds support USB Mass Storage, but I haven't heard of one that handles it perfectly (which isn't too surprising, considering Android runs -sort of- from the SD card).
So in short, no there is no other way at this moment that I know of.
Edit: There is a way: through WiFi! There are some applications available on the market that turn your phone into an FTP-server, I use Websharing (Lite) for this. They don't need an unmounted SD card, so they'll probably solve your problem.
StephanV said:
Edit: There is a way: through WiFi! There are some applications available on the market that turn your phone into an FTP-server, I use Websharing (Lite) for this. They don't need an unmounted SD card, so they'll probably solve your problem.
Click to expand...
Click to collapse
Yeah I was thinking more of teh same route, Ive been using drop box for the moment but FTP server would be much better.
I was hoping there would be a solution to been able to access teh files that have been sent via mass storage mode but this could be just as good.
thnx for suggestion.
This is not a quickfix, but I was frustrated with the same problem last night when I was trying to locate the files that I just transferred to the phone. I noticed that unmounting, and remounting doesn't refresh the folders in the system. But I managed to find the transferred files after unmounting the sd card, and then browsing to the root sd card path instead of the mounted partition.
So, instead of mnt/sdcard/ you should look for the files in /sdcard after unmounting the card. See if that works, at least it worked for me last night.
Use droid explorer
Hey all,
So I just ran ClockworkMod (2.5.13) and wiped my Vibrant in preparation for the new Bionix. I have found that on my phone I had to wipe sdcard too or it wouldn't wipe fully. The problem: ClockworkMod won't let me mount USB storage or mount sdext so I can't figure out how to get the new ROM on the phone. Voodoo is also enabled and I can't seem to disable it without a working ROM on the phone.
When I plug the phone into my PC the "H" and "I" drives automatically pop up but are inaccessible. Mounting USB storage in ClockWorkMod appears to do nothing.
Any ideas? Thanks!
ohhhhhhhhh
I had the same problem last night but i thought my PC was acting up. I guess it has to do with CWM, but idk why.
What i did was copy the ROM on my external sd card, then put it on the phone and move them to internal sd card
Hope that help
you can use adb to push file to your phone.
Djapatos said:
I had the same problem last night but i thought my PC was acting up. I guess it has to do with CWM, but idk why.
What i did was copy the ROM on my external sd card, then put it on the phone and move them to internal sd card
Hope that help
Click to expand...
Click to collapse
CWM won't let me mount SDEXT. Is there something special I have to do to get this to work?
You may have to pull the sd card and use an external card reader.
Sent from my SGH-T959 using XDA Premium App
ADB did the trick. I didn't realize it could push to the phone like that. Easy cheesy. Thanks!
And as for external SD card reader - this doesn't do anything to help transfer a file to the phone. Recovery was unable to mount SDEXT. I can't find any documentation on the matter, but I assume this is a Vibrant-related issue?
Hi, I just have the exact problem on my galaxy note. Trouble is that I can't find a way to connect to my phone through ADB. It just isn't listed when I type "adb devices". I would appreciate any help so I could "push" a rom and be done with it.
demircantas said:
Hi, I just have the exact problem on my galaxy note. Trouble is that I can't find a way to connect to my phone through ADB. It just isn't listed when I type "adb devices". I would appreciate any help so I could "push" a rom and be done with it.
Click to expand...
Click to collapse
Check Applications/Development/Enable USB Debugging. If that is on, make sure you have the necessary drivers on the PC.
As for mounting via CWM, that should work if CWM gives the option. Again, check drivers on PC.
I just got my Iconia today and I used the gingerbreak root method and confirmed I had root and then installed CWM recovery via the Acer Recovery Installer but when I boot to recovery and try to run a backup I get the following message:
Kernel does not support usb storage
I am also not able to mount the sd card in either recovery or when the OS is running.
I don't see any other information about this problem. What have I missed?
richdaley said:
I just got my Iconia today and I used the gingerbreak root method and confirmed I had root and then installed CWM recovery via the Acer Recovery Installer but when I boot to recovery and try to run a backup I get the following message:
Kernel does not support usb storage
I am also not able to mount the sd card in either recovery or when the OS is running.
I don't see any other information about this problem. What have I missed?
Click to expand...
Click to collapse
I have the same problem, anyone know a solution.
My Iconia not read any USB pendrive or keyboard or mouse connected.
Please help!!!!
It does or at least it seem to if you look in the mnt dir you see directory for both external card and usb storage. It is just that the system does not but up any notices of have a card or usb storage unless you look in those directory or system storage setting.
Common problem, plenty of posts about it on here.
CWM is fussy about which SD cards it will work with. Either try formatting your card from the tablet or an Android phone, or try another card.
Smaller cards seem to work best.
Yes, FloatingFatMan rights. I do have problem with external sdcard with CWM before, try to update ROM. Just give it a clean fat32 format. Reboot the system until you are able to access external sdcard and back again to the cwm.
put the card before power on...
or the usb drive before power on...
CWM does not like you change sdcard when it's running
once the device is started on CWM , do not remove sdcard or else.
sanaell said:
put the card before power on...
or the usb drive before power on...
CWM does not like you change sdcard when it's running
once the device is started on CWM , do not remove sdcard or else.
Click to expand...
Click to collapse
My SDCard (4Gb) is always in slot and in Android OS with File Manager HD i see it and i can use it normally.
Only in CWM i have this error, and i have problems with USB external storage: USB pendrives, mouse or keyboard connected to Iconia not work.
The Pendrive's led is on but not work in system, all USB pen drive(1Gb, 2Gb or 32Gb) i test are formatted in FAT32 and after Update to 3.1 Stock not work again.
I go to a shop with Iconia to test in it and my Pendrives work correctly in these devices with 3.0.1 HC.
I use a lot of different File Manager (Root Explorer, File Manager HD, Astro) with same result, if i go in /mnt/usb_storage i dont see anything.
Any solution?
My iconia is damaged or it's a software problem????
ssj5trunks said:
My SDCard (4Gb) is always in slot and in Android OS with File Manager HD i see it and i can use it normally.
Only in CWM i have this error, and i have problems with USB external storage: USB pendrives, mouse or keyboard connected to Iconia not work.
The Pendrive's led is on but not work in system, all USB pen drive(1Gb, 2Gb or 32Gb) i test are formatted in FAT32 and after Update to 3.1 Stock not work again.
I go to a shop with Iconia to test in it and my Pendrives work correctly in these devices with 3.0.1 HC.
I use a lot of different File Manager (Root Explorer, File Manager HD, Astro) with same result, if i go in /mnt/usb_storage i dont see anything.
Any solution?
My iconia is damaged or it's a software problem????
Click to expand...
Click to collapse
if you can t plug anything mouse pendrive etc... then... why you are looking too far...
I might say HARDWARE problem.
change your iconia asap
sanaell said:
if you can t plug anything mouse pendrive etc... then... why you are looking too far...
I might say HARDWARE problem.
change your iconia asap
Click to expand...
Click to collapse
Today i sent my Iconia to Acer support.
I hope it'll come back quickly.
Bye
never send rooted/jailbreaked stuff to support or they unroot and hard reset n blame it on root/jailbreak happened with my friends ipad 2 and his android phone after the stopped responding to external storage and the transfer cables
I was following this guide to root, install a custom recovery, and then flash a ROM onto my phone. I rooted successfully and created a back up. I then copied the backup onto my external sd card. I then put the custom rom onto my sd card and entered recovery mode on CWM. I wiped my device and then realized that the custom rom was the incorrect file. I then went to restore and it gave me an error md5 mismatch. I then went to restore of external sd card and it said it could not find the directory. I then went to restart phone and CWM said I was not rooted anymore and asked if I wanted root access and I hit yes.
My phone will not start and just remains in the Samsung loading screen with an unlocked graphic with the words "custom" under it. I am able to get back into CWM recovery but nothing else seems to work. I appreciate any help I can get. Thanks
domisterwoozy said:
I was following this guide to root, install a custom recovery, and then flash a ROM onto my phone. I rooted successfully and created a back up. I then copied the backup onto my external sd card. I then put the custom rom onto my sd card and entered recovery mode on CWM. I wiped my device and then realized that the custom rom was the incorrect file. I then went to restore and it gave me an error md5 mismatch. I then went to restore of external sd card and it said it could not find the directory. I then went to restart phone and CWM said I was not rooted anymore and asked if I wanted root access and I hit yes.
My phone will not start and just remains in the Samsung loading screen with an unlocked graphic with the words "custom" under it. I am able to get back into CWM recovery but nothing else seems to work. I appreciate any help I can get. Thanks
Click to expand...
Click to collapse
You can either use a MicroSD to SD adpater and the computer's card reader to copy a ROM over and flash it, or ODIN back to stock, and start over.
Ol' Dirty Bastard said:
You can either use a MicroSD to SD adpater and the computer's card reader to copy a ROM over and flash it, or ODIN back to stock, and start over.
Click to expand...
Click to collapse
Much better. Was that so hard? Thank you for details.
(jab)
Any ideas why it cannot find directory when I try to restore from my external sd card.
write protected
domisterwoozy said:
Any ideas why it cannot find directory when I try to restore from my external sd card.
Click to expand...
Click to collapse
Clueless here. Made a post about it.
I just discovered today more than just myself are unable to plug the handset into a computer to exchange files. I can get things off the phone onto the computer, but not vice versa.
Also the handset itself is fussy when it comes to viewing it's own external SD card. It would seem it doesn't take much for it to disappear, once in recovery.
fukenbiker said:
Clueless here. Made a post about it.
I just discovered today more than just myself are unable to plug the handset into a computer to exchange files. I can get things off the phone onto the computer, but not vice versa.
Also the handset itself is fussy when it comes to viewing it's own external SD card. It would seem it doesn't take much for it to disappear, once in recovery.
Click to expand...
Click to collapse
This phone does not support mass USB storage. It uses MTP and PTP protocols. This information is available in several threads in the forum. Now, of course, even with MTP and PTP you should be able to still transfer files from a PC to the Ext. SD card considering you have the correct drivers. Perhaps your SD card isn't playing nice with your phone? Have you tried removing the card from your phone and transferring files to it dierectly from you PC via SD slot or card reader? Have you tried other brands? I find Samsung cards work best, but that is just me, This will help to see if it is the phone (possibly cable) or the card that is having issues.
Also, you can check this out. It supposedly enables Mass USB storage for this phone...though it still says it doesn't work for the Ext. SD card. I have never tried it, so if you do it is at your own risk but maybe it will help? Good luck.
https://play.google.com/store/apps/details?id=com.mohammadag.samsungusbmassstorageenabler
The app says it is for the SIII, but people have reported it as working with the S4 as well.
thank you
scott14719 said:
This phone does not support mass USB storage. It uses MTP and PTP protocols. This information is available in several threads in the forum. Now, of course, even with MTP and PTP you should be able to still transfer files from a PC to the Ext. SD card considering you have the correct drivers. Perhaps your SD card isn't playing nice with your phone? Have you tried removing the card from your phone and transferring files to it dierectly from you PC via SD slot or card reader? Have you tried other brands? I find Samsung cards work best, but that is just me, This will help to see if it is the phone (possibly cable) or the card that is having issues.
Also, you can check this out. It supposedly enables Mass USB storage for this phone...though it still says it doesn't work for the Ext. SD card. I have never tried it, so if you do it is at your own risk but maybe it will help? Good luck.
https://play.google.com/store/apps/details?id=com.mohammadag.samsungusbmassstorageenabler
The app says it is for the SIII, but people have reported it as working with the S4 as well.
Click to expand...
Click to collapse
I am too happy to experiment like that. The AT&T S4 running GoldenEye with no add ons is the best darn handset I've ever enjoyed. I love being rid of the bloatware. I don't miss it a bit. I will fuss around with the SD interface as I do have resources like you mentioned, I can try a different chip. I didn't consider that a bad chip would cause the computer to consider the entire handset as "read only", yet you suggest it's possible?
fukenbiker said:
I am too happy to experiment like that. The AT&T S4 running GoldenEye with no add ons is the best darn handset I've ever enjoyed. I love being rid of the bloatware. I don't miss it a bit. I will fuss around with the SD interface as I do have resources like you mentioned, I can try a different chip. I didn't consider that a bad chip would cause the computer to consider the entire handset as "read only", yet you suggest it's possible?
Click to expand...
Click to collapse
Anything is possible and it would be a simple way to maybe help identify where the problem lies. Better yet, take your sd card out of your phone and try a transfer. That will let you know if it has anything to do with it. If it still doesn't work, it more than likely has nothing to do with the SD card.
Can you transfer files from your External SD card to your phones internal SD memory and the other way around (via a file manager on your phone)?
If you can, I can't see how it would be a "read' only problem.
scott14719 said:
Anything is possible and it would be a simple way to maybe help identify where the problem lies. Better yet, take your sd card out of your phone and try a transfer. That will let you know if it has anything to do with it. If it still doesn't work, it more than likely has nothing to do with the SD card.
Can you transfer files from your External SD card to your phones internal SD memory and the other way around (via a file manager on your phone)?
If you can, I can't see how it would be a "read' only problem.
Click to expand...
Click to collapse
I should unhook my phone from the 3.5mm jack and look into this. As I type, my S4 is piping in my playlist to provide the wife and I musical background for our activities. I remember using "Root Explorer" recently to delete a nandroid backup, and to move said playlist off the SD card into Phone memory. The "write protected" error showed up directly after building this playlist, using the computer to organize it. It's brand new, and as a good troubleshooter, we always look at the last thing you did different. I used the "windows explorer" to edit my playlist on the phone while it was plugged up together.
It's turning out to be a bigger deal than just myself, and I should pursue your recommendation for testing and reports, but it's not broken enough to fix and it's Sunday night, and the music is more important at this juncture.
Edit:
I powered down and then removed the Micro SD, and when I powered back up, it showed that cool padlock icon with the label "Custom" screen during boot up. I hadn't seen that screen on boot up since I used Casual to get a TWRP recovery.
I tethered the handset to the Desktop and opened the windows explorer. Obviously it just showed phone this time, instead of phone and card. I tested copying files and it worked fine, the "write protected" error was gone.
I unhooked, powered down, put the micro SD card back in, powered up and noted the boot up screen was back to normal. Tethered up again and voila! Files can be written to the phone and or the card and no more "write protected" error.
Funny little fluke. Problem solved. Curiosity remains.
T-Mo S2, took the nougat update, and even using "MyFiles" all attempts to write to the external sdcard fail. I can't even enable permissions for root explorer or es-filemanager pro. I'm frustrated enough to use this tablet as a weapon in a road rage incident. Anyone else seeing this or is there something I've missed along the way?
scottricketts said:
T-Mo S2, took the nougat update, and even using "MyFiles" all attempts to write to the external sdcard fail. I can't even enable permissions for root explorer or es-filemanager pro. I'm frustrated enough to use this tablet as a weapon in a road rage incident. Anyone else seeing this or is there something I've missed along the way?
Click to expand...
Click to collapse
Don't use supersu 2.82 SR1
I'm not rooted. It's totally stock
Something's not right because I have no problems on my T713. Bone stock. I just finished copying some pix from a USB-OTG to the micro SD. Went without a hitch.
scottricketts said:
I'm not rooted. It's totally stock
Click to expand...
Click to collapse
I have difficulty to write on SD card for some of the apps (such as GPS) after update. But, the file explorer and some other apps are ok. I believe the problem is caused by app permissions and needs to be solve as per app level.
scottricketts said:
T-Mo S2, took the nougat update, and even using "MyFiles" all attempts to write to the external sdcard fail. I can't even enable permissions for root explorer or es-filemanager pro. I'm frustrated enough to use this tablet as a weapon in a road rage incident. Anyone else seeing this or is there something I've missed along the way?
Click to expand...
Click to collapse
It just a permission. It will pop up with permission request then you choose internal or external at root of storage. My can read/write from internal, microsd card, and even 1tb WD hard drive (without power) all no problem.
I'm having the same problem. I was running stock to this happened and have since rooted and tried two, (at the end of the day not very) different ROMs. Resurrection remix and Lineage OS both running nougat and neither have worked. I've tried using adb partition without success and root essentials asks me to flash ASPlugin.zip which I have tried with the flasher and through twrp. Neither works as it asks me to flash it again when I retry root essentials. No errors get thrown while flashing ASPlugin.zip.
I'm also at the point of wanting to throw my tab against the wall.
The permissions window pops up but it does not seem to effect the external SD card.
this link shows how to fix it:
https://www.youtube.com/watch?v=VJRKuQf0puE
ES File Explorer Pro permits root permission, but it's not very obvious as to how it works. Execute a copy or move, you'll be prompted to go to the root of the card, click on the card link, then bottom right hand corner, click the select button and it's done.
Hi everyone.
I found this thread while searching for an answer to the same problem, which drove me almost crazy, too.
I decided to post my solution here, so that it might help others in the future.
As I said: I had the said problem, too.
No writing to ext. SD card, also no writing to my USB-stick via USB-OTG (On The Go), after updating my Tab S2 (SM-T815) to Nougat (Android 7.0) with a stock ROM and then rooting it with magisk (which btw went surprisingly well!).
I am using FX File Explorer, bought it even to be able to use it as root explorer, imho it's one of the best ones out there.
Connected to my PC I could pull or write files to my internal storage as well as to my external SD card via MTP, though.
Strange, but to those of us with just enough know-how to not brick the phone when flashing "stuff" the higher functions seem to be magical anyway, so I didn't take too much time to wonder.
I tried unmounting and mounting both SD card and USB stick, but that would not help.
Also disabeling writing acces in FX explorer and enabeling it again showe no effect. All I got was an error message "Internal Error".
The post above gave me the hint about permissions. (I couldn't watch the linked Youtube video, because my PC has no speakers atm, and I also had no headphones. Also, it looks like the video solves an intirely different problem anyways, not sure why tensux posted this here!?)
So I checked the permissions by using FX.
I went to /root then checked the permissions for /root/sdcard which were set to rwx,rwx,rwx.
Then I checked the SD card (and the USB, while I was at it anyways) via root/storage/[technical name of my SD card like 5555-2843] and /root/storage/[technical name of my USB-stick like 2234-1289] and found that both had their permissions set to rwx,rx,rx.
I marked the respective folders, went to security through the context menu, and changed the permissions to rwx,rwx,rwx in each of them. It would not stick in the grafics, meaning afterwards the permissions still showed no change, even when I restarted the Tablet, but...
I went back to the regular FX explorer and unmounted and mounted both SD card and USB-stick again. I still got the error message, only this time I tried to copy, move or delete a file there was no problem anymore, neither from or to the SD card nor the USB-stick.
After several restarts I still can write to my SD card as well as to my USB-stick, so I must have done something right.
.
Thank you XDA for being a place of knowledge, maybe I could give back a little and maybe this report helps someone else out there.
McFex said:
Hi everyone.
I found this thread while searching for an answer to the same problem, which drove me almost crazy, too.
I decided to post my solution here, so that it might help others in the future.
As I said: I had the said problem, too.
No writing to ext. SD card, also no writing to my USB-stick via USB-OTG (On The Go), after updating my Tab S2 (SM-T815) to Nougat (Android 7.0) with a stock ROM and then rooting it with magisk (which btw went surprisingly well!).
I am using FX File Explorer, bought it even to be able to use it as root explorer, imho it's one of the best ones out there.
Connected to my PC I could pull or write files to my internal storage as well as to my external SD card via MTP, though.
Strange, but to those of us with just enough know-how to not brick the phone when flashing "stuff" the higher functions seem to be magical anyway, so I didn't take too much time to wonder.
I tried unmounting and mounting both SD card and USB stick, but that would not help.
Also disabeling writing acces in FX explorer and enabeling it again showe no effect. All I got was an error message "Internal Error".
The post above gave me the hint about permissions. (I couldn't watch the linked Youtube video, because my PC has no speakers atm, and I also had no headphones. Also, it looks like the video solves an intirely different problem anyways, not sure why tensux posted this here!?)
So I checked the permissions by using FX.
I went to /root then checked the permissions for /root/sdcard which were set to rwx,rwx,rwx.
Then I checked the SD card (and the USB, while I was at it anyways) via root/storage/[technical name of my SD card like 5555-2843] and /root/storage/[technical name of my USB-stick like 2234-1289] and found that both had their permissions set to rwx,rx,rx.
I marked the respective folders, went to security through the context menu, and changed the permissions to rwx,rwx,rwx in each of them. It would not stick in the grafics, meaning afterwards the permissions still showed no change, even when I restarted the Tablet, but...
I went back to the regular FX explorer and unmounted and mounted both SD card and USB-stick again. I still got the error message, only this time I tried to copy, move or delete a file there was no problem anymore, neither from or to the SD card nor the USB-stick.
After several restarts I still can write to my SD card as well as to my USB-stick, so I must have done something right.
.
Thank you XDA for being a place of knowledge, maybe I could give back a little and maybe this report helps someone else out there.
Click to expand...
Click to collapse
All external storage write permissions are granted on a per app basis as per Google's security specs.
If an app has issues with writing to external storage then it is the app at fault.
The developer needs to update the app with the new permissions.
I have many Android devices and for all of these devices I use Root Explorer.
This is and has always been the best Root file explorer since day one. It does what it needs to do without any silly unnecessary bells and whistles.
Any serious developer will use this app as it's proved to be the most reliable and the dev is on the ball with this app.
Never have I had an issue with it.