microsd card care - EVO 4G General

OK, here's the deal, i got a 32 GB micro sd card ( class 10 ) about 4 months ago now and twice in the last 3 weeks it got corrupted. Some of the files were still available but for the most part, about 80% of all files were unreadable. The first time it happened was after unmounting my card from a mac, the second time i was unmounting from a pc but it was only charging.
I know it might be that the card is dieing or that its a low quality card but does anyone have any specific rules or un-mounting tricks that would reduce the risk of corrupted files on the sd card?
I am always plugging my phone into multiple computers for file access so it has to be something that i can initiate from the phone end.

Do you turn off Disk mode on the phone before you pull the usb cord out? If not, that's generally a good thing to do.

jesuspgt said:
Do you turn off Disk mode on the phone before you pull the usb cord out? If not, that's generally a good thing to do.
Click to expand...
Click to collapse
well, which should you do first? turn off disk mode or eject from the computer?

After having that happen with the 16GB SD card in my Nook Color, I pretty much avoid removing it from the device as much as possible. With the Evo, just use disk mode and transfer files that way without ever taking the card out of the Evo. If you ever do remove it be sure the "unmount" it frist from the phone, and eject properly from the computer.

I don't bother with the computer end, for any USB devices. I guess if you did want to do both you'd want to do the computer end first, since disabling disk mode also mounts the sd card on the phone in addition to unmounting it as a disk.

Did you buy it from an authorized retailer?

i bought it from newegg.
well, i"ve noticed that it happened once when i ejected from the pc frist and then frpom the phone.

turn off disk mode...wait till your phone settles and then yank the cord.

Related

HD2 destroyed my SD card?

Hello.
After trying the android booting, for 5-6'th time (all working), now the phone can't see the SD card. I thought it was only on the phone, but when i insert the card, in adapter and connect to pc, then NOTHING happens. Like if the card wasn't there.. Hmm, any clue? Usually I just formatted. But now, I can't format a SD card which "isn't there."
Please.
any one??? :S
mooooooa said:
Hello.
After trying the android booting, for 5-6'th time (all working), now the phone can't see the SD card. I thought it was only on the phone, but when i insert the card, in adapter and connect to pc, then NOTHING happens. Like if the card wasn't there.. Hmm, any clue? Usually I just formatted. But now, I can't format a SD card which "isn't there."
Please.
Click to expand...
Click to collapse
Sounds like your sd card maybe corrupt, they can die for no apparent reason, its happen to me twice in about 4yrs, tho i always buy from CEX they offer a 1yr warranty & just replace it if its within that time.
There's been a few threads about this;
http://forum.xda-developers.com/showthread.php?t=712281
http://forum.xda-developers.com/showthread.php?t=646731
Which brand?
mooooooa said:
Hello.
After trying the android booting, for 5-6'th time (all working), now the phone can't see the SD card. I thought it was only on the phone, but when i insert the card, in adapter and connect to pc, then NOTHING happens. Like if the card wasn't there.. Hmm, any clue? Usually I just formatted. But now, I can't format a SD card which "isn't there."
Please.
Click to expand...
Click to collapse
What is the brand of the memory card?
hey dude,i got the same problem as yours few days ago..cant do much abt it,i just buy a new one..some says the htc that makes the sd card problem
Hi,
My 8 GB sd card lags when i`m scrolling in the file manager.
In addition, the sd card drains the HD2 battery. I loose 35% in 6 hours in flight mode, but only 4% when not in flight mode without the sd card... ( this also yields for the original sandisk 2 GB sd card that was supplied with the phone).
Anyone experienced the same issue?
Is this hardware or software related, and can i fix this myself?
Error check your microSD card using your computer then switch your phone off, put the card back in it and switch your phone back on. The phone will need to index your music/video files etc so go to the relevant tabs and let it do its stuff. See how that helps.
mooooooa said:
Hello.
After trying the android booting, for 5-6'th time (all working), now the phone can't see the SD card. I thought it was only on the phone, but when i insert the card, in adapter and connect to pc, then NOTHING happens. Like if the card wasn't there.. Hmm, any clue? Usually I just formatted. But now, I can't format a SD card which "isn't there."
Please.
Click to expand...
Click to collapse
i got a new HD2 and it came with a MicroSD card. I put a couple of cooked ROMs on it and everything was fine for about a week and then the card jsut stopped working. I didnot use it on any other phone or on my PC and it just died.
I own an HTC Hero as well and i put the card in it but it wouldnt recognize it. It has never happened to me before. Never has a card died on me.
I think its a problem with the way the HD2 accesses the SDcard. I wouldnt know specifics but this is the first phone that fried my SD card.
Hey guys, I had the same issue. The SD card stopped working and cannot be formatted now via computer.
My experience with Windows Mobile is that the SD/CF driver is the weakest link. The problem seems to be simultaneous accesses drive it bonkers. I've had the disappearing card problem on other PDAs but usually removing it, doing a reboot with it out, and then inserting it after the reboot is complete will fix it. If it doesn't show up immediately DON'T do anything for a while, it could be doing a CHKDSK on the card, and if you mess with it it will screw it up worse.
Once it shows up what I would recommend is hooking up via USB in CF Disk mode (not Activesync) and doing a format on the drive from Windows.
Last night I got a new 32gb Class 4 MicroSD from China (unnamed) and stuck it in, worked fine, so I backed up all my data to my 'puter off the T-Mobile Class 2 16gb and changed to the new 32gb SD. I started the copy and after a while went to bed.
This morning I got up and it had died during the copy. It was giving me an error on the new MicroSD. It had copied about 75% but was asking to continue or skip. I ended up having to cancel it because it appeared full but it was not. After a reboot I found a ton of FILEXXX.CHK files which indicated it was doing a chkdsk.
Looking at it with SoftWinter.com's Storage Tools the disk was formatted with 512 byte cluster size, way too small for such a large disk, so it was not really out of space just out of cluster nodes. If you have lots of files (I had 10,000) each takes up at least one, even if the file is only 5 bytes. So I reformatted it from the 'puter to 32k cluster size and started the copy over. Seems to be working better now.
Please note that using larger cluster size also will help performance when writing and reading large files as it has to do less directory accesses. Small cluster size is good if you have a lot of small files as it doesn't waste as much space. You lose on average 1/2 the cluster size for each file, as the last node is almost never full.
mknewman said:
My experience with Windows Mobile is that the SD/CF driver is the weakest link. The problem seems to be simultaneous accesses drive it bonkers. I've had the disappearing card problem on other PDAs but usually removing it, doing a reboot with it out, and then inserting it after the reboot is complete will fix it. If it doesn't show up immediately DON'T do anything for a while, it could be doing a CHKDSK on the card, and if you mess with it it will screw it up worse.
Once it shows up what I would recommend is hooking up via USB in CF Disk mode (not Activesync) and doing a format on the drive from Windows.
Last night I got a new 32gb Class 4 MicroSD from China (unnamed) and stuck it in, worked fine, so I backed up all my data to my 'puter off the T-Mobile Class 2 16gb and changed to the new 32gb SD. I started the copy and after a while went to bed.
This morning I got up and it had died during the copy. It was giving me an error on the new MicroSD. It had copied about 75% but was asking to continue or skip. I ended up having to cancel it because it appeared full but it was not. After a reboot I found a ton of FILEXXX.CHK files which indicated it was doing a chkdsk.
Looking at it with SoftWinter.com's Storage Tools the disk was formatted with 512 byte cluster size, way too small for such a large disk, so it was not really out of space just out of cluster nodes. If you have lots of files (I had 10,000) each takes up at least one, even if the file is only 5 bytes. So I reformatted it from the 'puter to 32k cluster size and started the copy over. Seems to be working better now.
Please note that using larger cluster size also will help performance when writing and reading large files as it has to do less directory accesses. Small cluster size is good if you have a lot of small files as it doesn't waste as much space. You lose on average 1/2 the cluster size for each file, as the last node is almost never full.
Click to expand...
Click to collapse
Hey
i hope for your sake im wrong, but as far as ive been able to find out in my own searching, only san disk has released a 32gb micro sd & its only class 2.
there has been a lot of talk of fake 32gb micro sd's from china, most are actually 4gb re-programed to read as 32gb on your phone or pc, but when you start to fill them with files more than their actual capacity they will only overwrite prev' files & become corrupt.
i actually pick up 1 (32gb) last weekend from a local store, tried to copy the contents of my 16gb, 7gb copied then an error occurred, 2nd attempt 9gb copied but files unreadable by phone or pc, fortunately i always buy from this store & they refunded (£50), straight away, still have 2 16gb cards ive had for about 9mnths with no probs.
there is another longer thread over in the Q&A section, you guys may find some useful feed back over there: http://forum.xda-developers.com/showthread.php?t=646731
Well, the one I got says SanDisk and I have done a full format and surface analysis, it checks out, but I am having trouble writing to it. Not sure what is up with it right now. I knew it was a fake but I thought it was a real fake, not a piece of junk. I hope you are wrong.
I´ve got problems too. I have two SanDisk 16 GB microSDHC cards and both of them are giving similar problems.
I´ve got my HD2 a few days ago and initially I used my old 16 GB card I bought with the X1 (then used with my TP2 and latest the HD2). Everything was working fine initially but then the problems arose. Now I have those problems:
1. Audio Manager has problems reading my music library. iPlay can read it though. Windows Media Player takes a long time building my music library but manages to do that eventually.
2. HTC Album can read my albums sometimes - sometimes not.
3. Resco Photo Manager can read the albums but sometimes it takes a long time to do it.
4. The computer can access the card without any problems after formatting and it seems not to be any problems reading or writing files to it. Installations of cabs stored on the memory card works.
5. Total Commander can access the card without any problems but takes slightly longer time than before to show all folders.
6. Running chkdsk in Windows gives the result of a perfectly working card.
7. The phone is draining battery in an abnormal way with the card inserted.
8. Flashing ROMs from the card worked initially but not any longer. Now it shows the threecolor bootloader screen instead.
The interesting thing is the fact both of my 16 GB cards has the exactly the same symptoms. I will try them in my X1, TP2 and Vivaz later to check out their behaviour.
When I inserts my old 8 GB card (everything made by SanDisk) everything works without any problems. Flashing ROMs work normally etc.
I´m running the Omega XT 3.0 and are using HardSPL3. The 16 GB card has worked perfectly initially with this ROM and HSPL so I don´t think they are related.
The whole thing seems to indicate some kind of "incompatibility" between the phone and the 16 GB cards. It´s like it is unable to handle that size of card correctly. It seems like it "trashes" the file system. My older 16 GB card started to behave badly which caused me to buy a replacement and now that replacement has the exactly the same behaviour.
My 8 GB card is an "ultra" SanDisk card. The troublesome cards are Class 2 cards. I began to have the impression the problem is some kind of issue with Class 2 - because the cards itself seems to be working after formatting.
I have formatted them with either Panasonic SDFormatter and the Format SD application on the phone. Both options gives the same result.

Samsung Fascinate goes crazy.

Not sure what's happening. I was trying to move a 1gb file to my Sd card from my laptop. The phone goes berserk. It freezes then wont start up while the file was transferring. Then it restarts and goes to main unlock screen the restarts again. I cant seem to transfer files unless they are below 200mb. Is there something wrong with the SD card?/
Also a few times it starts off as a fast transfer but then 75% done it slows down to a point where it transfers less than 1mb/sec
Is this a persistent issue? If you are bricked, the only advice I can give is get a decent quality sd card reader (preferably bundled with a micro sd to sd card adapter). I can recommend one. Actually I have yet to try editing my sd card directly - just a best guess.
Also you might try different means of transfer. Three examples are a) mounting phone as hard drive on computer and copying (which I presume you are doing already). b) dropbox c) adb push mega.mp4 /sdcard/mega.mp4

'Blank External SD card' ???

was trying to access a game after putting it into my phone and it froze, causing me to take out the battery and restart it.
After that, the phone wouldn't read the memory card but everything was fine.
I went back to stock and still, it's not reading it but everything else works fine. I will eventually have to re-root it but anyone know what the problem is?
after pulling down the upper bar, it says "SD card blank or has unsupported file system." HELP!!!!!!!!!!
Do You have a micro sd to sd adapter and an sd reader? If so, does your computer read the info? If not then the card is messed up, and needs to be formatted (lose everything) or replaced. Sometimes cards just die.
If you don't have an adapter and sd reader, then you can try formatting it from your phone but again, you will lose everything.
Had a similar problem, in the end bestbuy replaced my sd card as it happened the day I bought my phone. I would start by trying to use it in either another phone or on a computer(like in a usb micro sd card adapter)
Dalamar1320 said:
Do You have a micro sd to sd adapter and an sd reader? If so, does your computer read the info? If not then the card is messed up, and needs to be formatted (lose everything) or replaced. Sometimes cards just die.
If you don't have an adapter and sd reader, then you can try formatting it from your phone but again, you will lose everything.
Click to expand...
Click to collapse
seems like the card died because of a corrupted game file,..which sucks!
think I need to get another SD card...dammit..
computer won't read it, phone won't read it..
and like you devastator, i got the phone 5 days ago and had to replace the phone once already because of a crack inside the screen causing dead pixels. blahhh

[Q] SD Card crashed?

You guys are the most helpful!
My 16gb sandisk micro sd card is no longer being recognized. I booted my HTC HD2 in Android and mounted the sd card to transfer pics to my pc. Just then I got a call coming in and the phone immediately became unresponsive. I kept getting the force close message but I couldn't stop it (it seemed to be in a loop) So I unsafely disconnected the phone from the pc, took out the battery and rebooted it. It started up in windows, but when I went to check for the sd card it could no longer be found. I pull out the card put it back more than twice, and yet the phone failed to recognize my memory card.
Please help me guys
put the sd card into a card reader, connect to your pc and if if its recognised there, it might be a dying card I've lost 1 16GB and an 8GB in 18 months with my hd2
If the pc recognises the card with no error save the date, reformat to primary partition fat 32 using Easeus free edition, also try the phone without the card
Thank u
Hey ..I really do appreciate the time u took to respond. Funny I was thinking the same thing....I broke my old card reader, now I have to get another another on from Amazon.com. As soon as I can lay my hands on one that is gonna be my first move.
Again, thanks a bunch.
P.S
Sadly I feel like an idiot for not backing up my sd card...(more than 3000 photos on there )
wartibobo said:
You guys are the most helpful!
My 16gb sandisk micro sd card is no longer being recognized. I booted my HTC HD2 in Android and mounted the sd card to transfer pics to my pc. Just then I got a call coming in and the phone immediately became unresponsive. I kept getting the force close message but I couldn't stop it (it seemed to be in a loop) So I unsafely disconnected the phone from the pc, took out the battery and rebooted it. It started up in windows, but when I went to check for the sd card it could no longer be found. I pull out the card put it back more than twice, and yet the phone failed to recognize my memory card.
Please help me guys
Click to expand...
Click to collapse
After trying the SD Card thru a card reader and if it still doesn't work/recognize it - then your mobile (hd2's)windows is corrupted - coz the same happened with me thrice and ultimately I took it back to the HTC service centre and they re installed the windows 6.5 and since then everythings is working normally and there is no problem with the SD Card anymore, but your old card becomes thrash and you'll have to get a new card :0)
johnerz said:
put the sd card into a card reader, connect to your pc and if if its recognised there, it might be a dying card I've lost 1 16GB and an 8GB in 18 months with my hd2
If the pc recognises the card with no error save the date, reformat to primary partition fat 32 using Easeus free edition, also try the phone without the card
Click to expand...
Click to collapse
Same here. Lost a sd-card recently but probably due to my own fault.
The card was difficult to get out of the reader (Yup, it seems there is some tolerance on the size) so I had to use some small tweezers.
I finally managed to get it out without any visual damage but after inserting it in the HD2 it couldn't see it anymore, neither in the cardreader afterwards.
What I think is that I had physically bent the card and broke the connections to the actual memory chip.
Some good advice on memory cards and I can't stress this out enough especially for dedicated photo equipment. Instead of buying a 16GB card buy 2 x 8GB and from a known seller and known brand.
The best and probably worst experience example that I can give is from a couple who were on their honeymoon and lost all of their pictures because of a el-cheapo 8GB memorycard.
For a phone it is something else but I made a custom out of it to create a map on my c-drive called sd-card phone. Ok it is not a every week copy but it is handy to have the data on my pc and on my phone.

[Q] More MicroSD card problems

Hi everyone. This is the 3rd time my phone has spontaneously unmounted my card, and this time it simply destroyed my microSD card. I have no music on the card (read that thread) nor have I yet had any re-boot cycle problems. I simply get a message that the card has been "unexpectedly removed". It has, of course, not been. The first 2 times I was able to get the card working again with no data loss. I turned the phone off, took the card out, rebooted the phone without it, then re-inserted it and rebooted the phone again. It was fine. This time, the card was simply dead. My phone wouldn't see it, nor would my computer. I changed out the little adapter card case and finally the computer saw there was something, but said it was not in "any known format". My only choice was to format the card. I formatted it on the computer and ran a disk check on it, put it in the phone and booted up. I got a little icon with a question mark, and a message that the card was either blank or un-formatted. So, I let the phone format it. Again. It now shows up in the storage description, empty and usable- so I don't think it's a bad card. The card is a Samsung 8 gig card. Note3 is stock, 4.3, Verizon is the carrier. Build JSS15J.N900VVRUBMJE
I want to add that I think it has something to do with the camera. I have the camera app save directly to the card. I've noticed that on all three occasions this has happened, its been shortly after I had a couple of odd photos. A portion, usually the lower third of the photo (if you think of a grid) is gray. Just like part of it is cut off. I auto-save my photos to google, and they look fine when I view them there, but on the phone, they were corrupt. One didn't show up in the thumbnail preview in the gallery at all. Also, the camera was taking an inordinately long time to save. All my photo stuff is stock...gallery and camera app...no editing software except what little bit is offered in the gallery.
Has anyone else had similar problems. Anyone have any ideas for a fix?
I would try another card. If it happens again, then it's your phone. Sounds like a hardware issue. So try another card, if it happens again, Factory Reset. If it happens after that with different cards, then I would send my phone in for a replacement.
Sent from my SM-N900V using Tapatalk
What class card?
Sent from my SM-N900V using Tapatalk
stealthpaws said:
... I changed out the little adapter card case and finally the computer saw there was something...
Click to expand...
Click to collapse
FWIW, I have fooled around with moving microSD cards between:
(i) a camera (which uses a SD card adapter for the uSD)
(ii) a (POS) USB dongle card reader attached to a computer
(iii) same (POS) USB dongle card reader attached to a Nexus 7 OTG cable (rooted ROM or TWRP recovery running)
(iv) an older Android (Gingerbread) phone
In doing the above, all sorts of bad things have happened:
1) Occasionally the camera reports there is no card present (honestly, I think this is simply loose contacts when using a uSD to SD card adapter). Turning off the camera and re-inserting the card fixes this.
2) Loss of all files necessitating re-format after re-inserting card into Camera following a visit with the N7**
3) VFAT filesystem not recognized by OS kernel on the N7+OTG, but works fine with TWRP with same OTG+card reader (that is, some kind of strange kernel sensitivity)
4) Failure of Camera to recognize media after insertion into the GB Android phone - apparently due to many directories created at the SD card root. Card is not corrupted, but camera no longer recognizes it.
** this would only occur if I used the SD Card slot of the (POS) USB dongle card reader; if I plugged the the uSD card into the uSD slot on the (POD) USB dongle card reader, things were fine. Go figure.
So I guess what I am saying is that - based on my experience - your mileage is probably going to vary .
I was doing all this (albeit not with a Note 3) while I was travelling, and only had the Camera, Nexus 7, OTG cable, camera USB cable, and (POS) USB dongle card reader with me - no laptop or other computer.
Finally what I ended up doing - which seemed to cause the least amount of trouble - was to boot my tablet into recovery, and attach the camera to the tablet as an OTG Mass storage device. That is: the uSD card never leaves the camera.
I'm not up to speed about OTG on the Note 3 yet (e.g. is root even needed?), so I don't know what your options are there, but perhaps this gives you a couple of different things to try.
Just make sure you've got all your photos backed up safely off the uSD card before you start experimenting.
cheers
.
[Edit] I see I am guilty of not reading the OP carefully - you were only moving the card out of the Note3 to investigate what was going wrong, not as a matter of course.
Anyway, it could be a mechanical issue (intermittent contacts), or it could be a bad card. Although card class might make a difference for high-speed writing, you shouldn't experience corruption even if you are using a very slow (class 2) card - unless there are bugs in the kernel.
If you have another card to try out (before you rush out and start buying cards), that might be a useful experiment.
Question? SD Card from eBay? I had no luck with 3 64GB Class 10 cards off eBay got fed up and went to Walmart and got a Ultra U1 Class 10 64GB and haven't had a problem since. I have tons of music and pics on it no problems for the last 2 months. Lots of fake SD Cards on eBay from what I read.
Just my 2 cents
I just found this again...I got pneumonia shortly after posting the original thread. Thanks to all for replying...I just forgot about this. SD card never did work properly. Just got OTA KitKat so I'll see how that plays out. I'm reading there are even more issues with external cards now.
neopolotin75 said:
What class card?
Sent from my SM-N900V using Tapatalk
Click to expand...
Click to collapse
Absolutely no idea. It's a 2 gig older card. That being said, it didn't like my 8 gig card, which works fine in my tablet, either
stealthpaws said:
Absolutely no idea. It's a 2 gig older card. That being said, it didn't like my 8 gig card, which works fine in my tablet, either
Click to expand...
Click to collapse
I've had issues with Sandisk 64gb class 10 cards randomly locking on my Note II and III.....turns out to be a samsung issue according to Samsung.
Sent from my SM-N900V using Tapatalk

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