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Hi, I recently got a Samsung Galaxy S5 and I bought an SD card for additional storage since the phone only has 16GB. Just in case, the phone is not rooted. I was trying to install an app earlier today and it wouldn't install because I didn't have any storage space left on my device. I wanted to know if there is any way to set the SD card as the default directory when downloading apps, stuff from the internet(videos, music, pictures), taking pictures and videos on the phone, etc. Thanks
For pictures/videos you can open camera and click the settings icon (top left) and choose storage location to be Memory Card.
Some large apps (like games), if you go to settings and app management, let you transfer them to SD card.
You can also go to settings, storage, and clear cache.
I have a 128 gb class 10 SD card. If I use it as internal can I still copy my 45gb of music through my computer?
Also what happened to the move to SD card option for apps?
I've also notice with Google play music you can't select SD card as storage for offline music.
I was pretty excited about this feature but I'm a little disappointed.
Maybe if I explore it a bit more I'll figure it out.
Spacemonkie4207 said:
I have a 128 gb class 10 SD card. If I use it as internal can I still copy my 45gb of music through my computer?
Also what happened to the move to SD card option for apps?
I've also notice with Google play music you can't select SD card as storage for offline music.
I was pretty excited about this feature but I'm a little disappointed.
Maybe if I explore it a bit more I'll figure it out.
Click to expand...
Click to collapse
If you connect your Play (with adaptive storage active) to a computer via usb the computer cannot seem to veiw anything on the phone. So you can't copy anything to the phone. Not very good really.
If you go settings, apps and then select an app you then select storage of that app and you have the option to move the app from there. That said not all apps have the storage option including Google Play Music. I do find that MM manages storage between internal and the sd card very well when adaptive storage is used. It's not perfect though. My next phone will be bigger than 16gb which is silly in this day and age. Relying on cloud storage is all well and good but can be useless in some rural locations (UK) with no data service signal.
I'm a little disappointed but on the whole I've got past the limited storage of a 16gb phone. Note to self - don't EVER buy a 16gb phone again. The music thing I get round by using Google Music and Spotify. You can copy music to your phone via such as Solid Explorer and move music from your cloud service (Drive, dropbox etc) to your phone. Solid Explorer and others can see folders and files on your phone.
You should be able to set the "Storage Location" in the Downloading section of Google Music's settings screen. Perhaps setting your SD card as internal memory removes your ability to select it though.
Spacemonkie4207 said:
I have a 128 gb class 10 SD card. If I use it as internal can I still copy my 45gb of music through my computer?
Also what happened to the move to SD card option for apps?
I've also notice with Google play music you can't select SD card as storage for offline music.
I was pretty excited about this feature but I'm a little disappointed.
Maybe if I explore it a bit more I'll figure it out.
Click to expand...
Click to collapse
Move to SD card option is gone with MM.
Sent from my XT1562 using Tapatalk
K.khiladi said:
Move to SD card option is gone with MM.
Sent from my XT1562 using Tapatalk
Click to expand...
Click to collapse
Can I use my card as internal but somehow copy my music to it?
Chaotic-Entropy said:
You should be able to set the "Storage Location" in the Downloading section of Google Music's settings screen. Perhaps setting your SD card as internal memory removes your ability to select it though.
Click to expand...
Click to collapse
Yeah it does, option is gone with sd card as internal. Hopefully they fix it.
Spacemonkie4207 said:
Can I use my card as internal but somehow copy my music to it?
Click to expand...
Click to collapse
The move to SD card option won't be back now until Google wants that and that doesn't seem happening.
You can't do anything with your card once it's formatted as internal storage. The system will automatically decide what to do.
Sent from my XT1562 using Tapatalk
K.khiladi said:
The move to SD card option won't be back now until Google wants that and that doesn't seem happening.
You can't do anything with your card once it's formatted as internal storage. The system will automatically decide what to do.
Sent from my XT1562 using Tapatalk
Click to expand...
Click to collapse
I've heard it can kill the SD card very quickly because of cache and number of reads and writes. How much truth is there to this?
Anyone else is having problems formatting his sd card as internal storage in marshmallow? my phone gets stuck at 30% formatting and never finishes, and i tried factory resetting. Formatting as portable storage works just fine.
any ideas?
Just wondering... Which size? I would assume that there could be a max size per partition...
Spacemonkie4207 said:
I've heard it can kill the SD card very quickly because of cache and number of reads and writes. How much truth is there to this?
Click to expand...
Click to collapse
Not much, the card might be worn out quicker but your still looking at 3 to 5 years with heavy writes and by that time you will probably have changed phone.
dreinulldrei said:
Just wondering... Which size? I would assume that there could be a max size per partition...
Click to expand...
Click to collapse
64 gb, but i've heard people with other devices that managed to make it work with 128gb cards
Enviado desde mi XT1562 mediante Tapatalk
About the adoptable storage in Android M and its work description (basing on analysis of upstream AOSP M code i did some time ago; note that there may be little differences depending on changes done by phone vendors for different devices).
There are 2 possible states of external storage (SD card in particular), the second one being available only if it is enabled in device configuration before build:
- portable - only accessible with Storage Access Framework and file browser in Settings app; most of the media apps won't see media files stored on external storage, as media scanner is disabled for this type of storage
- internal - external storage is wiped and encrypted with the same key as the very device (so factory reset will cause data loss, as then encryption key is changed, and after moving the storage to other device it content will be unavailable); this one has two substates
- - data not migrated: apps data and user data is being kept on internal storage; only internal storage is visible via MTP; if I remember correctly, external storage can be used only for moving apps installation on it in this case
- - data migrated: apps data and user data is moved to external storage and it replaces internal storage for user and app data storing; only external storage is visible via MTP (internal storage is used only for keeping system files and apps installations in this case); I would recommend not formatting SD card this way if it has lower capacity than internal storage.
About the issue of never ending formatting as internal: as the data is fully wiped from the card, new filesystem is created, and there is an overhead for encryption, this operation is time consuming. By default there is quite short timeout set for the operation, and if it is hit, formatting as internal will be aborted (leaving card in broken state). I suggest getting very fast card for this use (especially if it has high capacity), so for 128G the ones that people get to work were most probably ones with around 90+MB/s R/W performance.
Spacemonkie4207 said:
Can I use my card as internal but somehow copy my music to it?
Click to expand...
Click to collapse
Yes. I was wrong earlier in this post. If you plug your phone into computer then from drop down menu on phone select MTP rather than charge only, you can then see all files on sd card. You should be able to copy files across as usual. Seems to work on mine with adaptive storage enabled. You can only see files on the sd card and not internal memory.
I have bought a 64gb sd card with 90MB/s read and 80 MB/s write. I hope it works now.
I formatted my SD card as internal but ran out of space. Although storage showed I had 50+ GB free I couldn't install anything.
Sent from my SM-T810 using Tapatalk
You can move some apps to sd card which will free up some space on internal. Not all apps give you the option though. I reverted back from adaptive storage.
Apps like Spotify don't save music data to "adopted" SD card. Google Music seems to have similar issue. I keep my music content on the SD card - do that is a bit of an issue for me that Google "hates" my SD card .
Maybe this issue will be resolved in future android/app updates.
One thing - Change your storage for pictures taken through camera to SD card
Also move songs that you download to SD card as they get stored to internal storage.
Dont format your SD card if you want to see the data in your SD card on pc and file managers.
Let the apps install on internal.
Try to move every other data to SD card periodically.
Sent from my XT1562 using Tapatalk
habskilla said:
I formatted my SD card as internal but ran out of space. Although storage showed I had 50+ GB free I couldn't install anything.
Sent from my SM-T810 using Tapatalk
Click to expand...
Click to collapse
Thats bonkers, i thought the whole point of adopted storage was you just ended up with one bigger lump of memory.
Can someone check the ability to transfer apps to the SD card? I have a Verizon S7 Edge, when I transfer an app to the SD card it says it moves but nothing seems to happen. The amount to storage on the card doesn't change and no new files are created. I have tried this with Audible and Strava.
bndfishing said:
Can someone check the ability to transfer apps to the SD card? I have a Verizon S7 Edge, when I transfer an app to the SD card it says it moves but nothing seems to happen. The amount to storage on the card doesn't change and no new files are created. I have tried this with Audible and Strava.
Click to expand...
Click to collapse
Yes, seems to be broken for me as well, it says to move and also shows it being on the external sd in the application manager afterwards, but the taken storage is the same on internal and external. It did create the subfolder in Android/obb for me on the external sd, but it was empty. I also tried to move the file within the folder by hand into the folder on the external, but the game simply wouldn't load afterwards (tried it with Implosion), just stayed on a black screen after the first starting screen.
Ok, found the problem, when you move the app from internal storage to external sd from within settings - > applications, it moves parts of the app from the internal data folder to the Android folder on the internal sd, what is pretty pointless...
Sent from my SM-G935F using Tapatalk
You could enable Adoptable Storage so that some of your external SD card will be used for internal memory: http://www.modaco.com/news/android/heres-how-to-configure-adoptable-storage-on-your-s7-s7-edge-r1632/
I know, but even while i have a class 10 card, i don't want the speed impact when putting all on the sd, also I'd like to use the internal storage to its full potential and just put some certain apps to the external sd, but thanks anyways.
Sent from my SM-G935F using Tapatalk
Samsung disabled the adaptive storage option. Here is the response I got from Samsung on the app data issue. I looks like they know the data isn't moving.
"I have checked our resources and found that whenever an app is moved to the SD card, only the app and the dependencies of the application for the Operating System to identify the app on the SD card are only moved. Data associated with the app is not moved to the SD card.
Let’s hope that our future updates should allow the user to move the apps data to the SD card along with the app.
I would have surely helped you if there was any other option to move the apps data to the SD card.
I appreciate your time in writing to us. "
Argh, how annoying is this? My s7 is doing exactly the same. Nothing is actually being transferred to the sd card with their move to sd tool! I'm glad I bought a 64gb card especially (not) grrr!
Just had a thought. Has anyone tried this with an encrypted SD card? Maybe that's why....
Hello Guys,
my P8 is currently running out of memory. I have inserted a 64GB SD Card and I've already set the main memory path to SD Card BUT as of an update has been released for any of my apps, the app will be moved back from external memory to internal.
I also recognized the external storage cannot be used completely as internal storage.
To be honest, my P8 is currently so slow, it doesn't make fun to use this phone any more Also no way to free up some internal space.
jigg3 said:
Also no way to free up some internal space.
Click to expand...
Click to collapse
What else have you tried so far to free up space?
Certain apps (especially music, video & photo ones) can accumulate a lot of unnecessary cache (& sometimes data), so clearing this up can help a lot - you can use the inbuilt 'Phone Manager' for this or a third-party cleaning app. For cleaning app data, you may want to be more careful, checking each one individually before deciding to clean (ask if in doubt).
Also, in the 'Phone Manager' app > Storage > Storage manager, you can view what kinds of files are taking up the most space in the internal storage. Then decide to move whatever is possible to the external card - using something like the free ES File Explorer app you can move all camera-taken photos+videos (plus other photos+videos if present), music, personal documents & probably everything in the Download folder to the external card.
Some more & related tips in this article to free up space: Five Ways to Free Up Space on Your Android Device
If space is still a problem after doing all the above, consider doing what it says in this article, including using the external card as adoptable storage (you may want to get a faster card for the latter though): How to Set Up a New SD Card in Android for Extra Storage
Another related article: How do I free up space on my Android phone?
.
Check out this thread
http://forum.xda-developers.com/honor-7/general/enabling-storage-adoption-marshmallow-t3318300/page1
As an experiment I stuck a 16 Gbyte microSD in my new Fire HD 8 tablet (2018 version, now on 6.3.1.2), and said ok to format as internal storage expansion.
As far as I can tell, no pre-installed apps or their data files were automatically moved to the microSD storage, and I haven't specifically told Fire OS to move anything, except for one thing: I was experimenting with side-loading Netflix from apk just to verify that it still won't support Chromecast on Fire tablet (it doesn't), and I noted that the Netflix app was eligible to move to external memory, so I did that. When I look under Settings/Storage, I see a summary that there is one app on the microSD card. but Fire OS won't tell me which app that it is. There is also 52 Mbytes of data simply labeled "Other". No idea what that is.
I wanted to try upgrading this to a 64-Gbyte microSD card, but as far as I can find online, there is no upgrade procedure. In fact there isn't even a downgrade procedure to remove the microSD card once used as internal storage. If it ever fails and you need to replace it, or you want to use the card for something else, or you want to use the microSD slot for data transfer via card, or you want to upgrade the card, the advice seems to be "factory reset the tablet, because there's no other way"!
That leads me to wonder if I should be doing this at all, given that it's so fragile and limited.
Knowing that Netflix was the one app I transferred, I can individually more it back to internal storage, and after that Settings/Storage agrees that there are no apps on the microSD card. There is still the mysterious unidentified 52 Mbytes "Other". Is it safe to remove the old microSD card now? Should I do that and forget about the whole "format as internal" option?
Out of curiosity, how do you know anything was moved to the SD card?
When formatted as internal storage, you should only see the device internal + the SD card as one whole internal memory pool. That's the point of formatting it as internal memory. It shouldn't know where device memory ends and SD memory starts.
If you can, please post a screen shot of the "Storage" page from "Settings".
I've attached a screen shot at the end of this post of mine with my SD card formatted as "external". Just curious how it shows this page when the SD card is set as "internal"
One other thing, I think it's not a good idea to format an SD card as internal - ever.
Except if you have extremely low device memory to begin with - like 16GB or less. 32 is barely passable, but for now, that's the most that the HD8s get. I'm getting by with it for now, but I don't use my tablet for all that much.
Also, here was Amazon's Help site information on dealing with SD cards in the HD8 8th gen (2018). The 7th gens are different in that formatting external as exFAT is an option. Not on the 2018 models. Amazon apparently didn't want to pay Microsoft for the license anymore - so, no more 4GB or bigger files on the SD card.
Insert and Manage a MicroSD Card
You can install, download, or store certain content on an external microSD card to expand your 8th Generation Fire HD 8 tablet's storage space.
Note: The following are the directions for Fire HD 8 (8th Generation) devices. If you have a 4th - 7th Generation Fire tablet, go to Insert and Manage an SD Card. Not sure which Fire tablet you have? Go to Which Fire Tablet do I have?
When you insert a microSD card for the first time, you can designate the card as internal or portable storage. If you designate the card as internal storage, you don't need to manually move content to the card or manage your download preferences. However, microSD cards that are designated as internal storage are not intended for removal from the device. If you do remove an SD card that you've designated as internal storage, you see a persistent pop-up message. To dismiss this message, either reinsert the SD card, or select "Forget" to remove any content associated with the SD card. If you remove a microSD card that is designated as internal storage your downloaded content may not work correctly.
Before you start:
You need to decide if you want to format your microSD card as internal storage or portable storage. If you designate your microSD card as internal storage, do not remove it from the device. If you do remove the microSD card, you must either reinsert the card immediately or select "Forget SD Card" from the pop up message that appears. If you select "Forget SD Card" then you lose all the data on your microSD card.
Your tablet supports FAT32 formatted microSD cards for portable storage. If your microSD card uses a different format (such as exFAT), it is reformatted during the setup process, and any information stored on the card is lost.
You can use all classes of Ultra High Speed (UHS) microSD cards up to 400 GB in size. For non-UHS microSD cards, Amazon recommends Class 10 microSD cards for optimal performance. Class 2 microSD cards may not perform enough to support video playback or capturing burst mode photos.
If you're using a Fire Kid's Edition tablet, make sure that you are in the adult profile before inserting the microSD card. You cannot set up a microSD card from a child profile.
To insert a microSD card:
Hold your Fire tablet vertically, with the front-facing camera in the top center. The microSD card slot is on the upper right side of your device.
Open the microSD card cover and turn it slightly to show the microSD card slot.
Push gently until it locks into place.
To remove your microSD card:
Swipe down from the top of the screen and tap the Settings (gear) icon.
Tap Storage. Tap Safely Remove SD Card, and then tap OK.
Open the microSD card cover and gently press on the microSD card to remove it.
If you designate a microSD card as portable storage, you can manage what content is installed, downloaded, or stored on your microSD card. Not all content types can be saved to portable storage.
To manage your preferences (for microSD cards designated as portable storage):
Swipe down from the top of the screen, tap the Settings (gear) icon, and then tap Storage.
Under SD Card, tap a switch next to a content category to turn microSD card support on or off. By default, all supported content categories are downloaded to the microSD card.
Tap SD Card Storage and then tap a content category to manage content stored on the microSD card.
Note: If you have multiple profiles on your device, content downloaded to the microSD card is restricted to the profile that downloaded it.
To move content to the microSD card:
Music:
Tap Music from the Home screen.
Tap the Menu icon or swipe in from the left side of the screen, and then tap Settings.
Tap Transfer All Offline Music, then tap Transfer All to SD Card.
Prime Videos, books and periodicals, and photos and personal videos: Delete the content from your device, then re download it after you have inserted a microSD card, designated the card as removable storage, and selected the option to save these content types to the card.
Click to expand...
Click to collapse
I say this was on Amazon's help site, because this is no longer there - not in any form that resembles the above at all. What I copied was the cached version from a couple months ago. Now, Amazon's help is overly simplified and totally useless.
Screen shot below...
DJames1 said:
As an experiment I stuck a 16 Gbyte microSD in my new Fire HD 8 tablet (2018 version, now on 6.3.1.2), and said ok to format as internal storage expansion.
As far as I can tell, no pre-installed apps or their data files were automatically moved to the microSD storage, and I haven't specifically told Fire OS to move anything, except for one thing: I was experimenting with side-loading Netflix from apk just to verify that it still won't support Chromecast on Fire tablet (it doesn't), and I noted that the Netflix app was eligible to move to external memory, so I did that. When I look under Settings/Storage, I see a summary that there is one app on the microSD card. but Fire OS won't tell me which app that it is. There is also 52 Mbytes of data simply labeled "Other". No idea what that is.
I wanted to try upgrading this to a 64-Gbyte microSD card, but as far as I can find online, there is no upgrade procedure. In fact there isn't even a downgrade procedure to remove the microSD card once used as internal storage. If it ever fails and you need to replace it, or you want to use the card for something else, or you want to use the microSD slot for data transfer via card, or you want to upgrade the card, the advice seems to be "factory reset the tablet, because there's no other way"!
That leads me to wonder if I should be doing this at all, given that it's so fragile and limited.
Knowing that Netflix was the one app I transferred, I can individually more it back to internal storage, and after that Settings/Storage agrees that there are no apps on the microSD card. There is still the mysterious unidentified 52 Mbytes "Other". Is it safe to remove the old microSD card now? Should I do that and forget about the whole "format as internal" option?
Click to expand...
Click to collapse
You can considered to backup your SD card contents to your PC or tablet's internal storage when you formatted as an internal storage.
You must be select Use as portable storage.
joeldf said:
Out of curiosity, how do you know anything was moved to the SD card?
Click to expand...
Click to collapse
My Fired HD 8 tablet is the 16 Gbyte model, so it doesn't have much memory. After initial setup it reported 7.x Gbytes free, presumably after accounting for the OS and Amazon bloatware.
After inserting a 16 Gbyte microSD card and formatting it as Internal, the tablet still only shows 7.x Gbytes free, so I'm not sure what's going on there. I've installed a couple of apps, but no more than a few hundred Mbytes. Yes, it was definitely formatted as Internal.
Under Storage it still distinguishes between the internal memory and the microSD card in the details, and I can drill down to see contents of the microSD card. It says the card contains one app and 52 Mbytes labeled "Other". I know that the app is Netflix, because it was the only app that offered a Move to SD option - none of the Amazon apps do. And when I move Netflix back to internal memory, the "one app" disappears from the SD card.
Don't ask me to explain it - this is what it shows.
DJames1 said:
My Fired HD 8 tablet is the 16 Gbyte model, so it doesn't have much memory. After initial setup it reported 7.x Gbytes free, presumably after accounting for the OS and Amazon bloatware.
After inserting a 16 Gbyte microSD card and formatting it as Internal, the tablet still only shows 7.x Gbytes free, so I'm not sure what's going on there. I've installed a couple of apps, but no more than a few hundred Mbytes. Yes, it was definitely formatted as Internal.
Under Storage it still distinguishes between the internal memory and the microSD card in the details, and I can drill down to see contents of the microSD card. It says the card contains one app and 52 Mbytes labeled "Other". I know that the app is Netflix, because it was the only app that offered a Move to SD option - none of the Amazon apps do. And when I move Netflix back to internal memory, the "one app" disappears from the SD card.
Don't ask me to explain it - this is what it shows.
Click to expand...
Click to collapse
I don't really understand why you are doing all that.
7 GB is more than enough space to install plenty of apps. Use your SD card to save your music and movies on it. Netflix, YouTube, Deezer, Google Music and probably every other video/audio app let's you save files to your SD card
DJames1 said:
My Fired HD 8 tablet is the 16 Gbyte model, so it doesn't have much memory. After initial setup it reported 7.x Gbytes free, presumably after accounting for the OS and Amazon bloatware.
After inserting a 16 Gbyte microSD card and formatting it as Internal, the tablet still only shows 7.x Gbytes free, so I'm not sure what's going on there. I've installed a couple of apps, but no more than a few hundred Mbytes. Yes, it was definitely formatted as Internal.
Under Storage it still distinguishes between the internal memory and the microSD card in the details, and I can drill down to see contents of the microSD card. It says the card contains one app and 52 Mbytes labeled "Other". I know that the app is Netflix, because it was the only app that offered a Move to SD option - none of the Amazon apps do. And when I move Netflix back to internal memory, the "one app" disappears from the SD card.
Don't ask me to explain it - this is what it shows.
Click to expand...
Click to collapse
It sounds like it ended up formatting as external "portable" storage after all. That's certainly how it seems like it's reading it.
I'm stumped.
Noter2017 said:
I don't really understand why you are doing all that.
7 GB is more than enough space to install plenty of apps. Use your SD card to save your music and movies on it. Netflix, YouTube, Deezer, Google Music and probably every other video/audio app let's you save files to your SD card
Click to expand...
Click to collapse
Not really. And I can understand the need for space if the tablet is the 16GB version. We have 3 HD8s in my house. My wife and son have the 2017 model and I have the 2018 model. All are the 32GB versions. My son is already getting close to his limit with about 2GB left after all the games and books he has on it using the Kids FreeTime side.
My tablet is already using just under 7GB of apps now. And I do have a 128GB SD card on it for music, and anything that can be offloaded from the main memory. If I had a 16GB model, I'd be in trouble.
Noter2017 said:
I don't really understand why you are doing all that.
7 GB is more than enough space to install plenty of apps. Use your SD card to save your music and movies on it. Netflix, YouTube, Deezer, Google Music and probably every other video/audio app let's you save files to your SD card
Click to expand...
Click to collapse
It's really not enough space. I have two 16 Gbyte phones, and I'm constantly deleting and restoring apps to make space, or getting the "not enough space to update" message. My other tablet with 32 Gbytes is fine.
I'm just not sure I want to experiment with this given the warning that there is no way to "undo" once you start using an SD card for internal memory extension, other than a factory reset of the Fire tablet. Another half-baked Android feature from Google...
joeldf said:
It sounds like it ended up formatting as external "portable" storage after all. That's certainly how it seems like it's reading it.
Click to expand...
Click to collapse
Nope, definitely formatted as internal storage. It seems that Amazon has been fiddling with the use of the SD card for storage in FireOS 6.3 compared to earlier versions.
When I look under Settings - Storage, I see the Internal Storage and the SD Card capacity and available memory listed separately.
There is an option for the SD card "Format as portable storage", which warns that I will lose access to any apps and data on the SD card if I proceed. There is no longer an option to format as internal storage as there was originally, which I selected when I installed the card.
I have option buttons to Move Apps and Move Data to the SD card. There is no automatic use of the SD card as an automatic extension to internal memory.
Only one app is eligible to Move to SD Card, and that app is not identified. But I know it is side-loaded Netfilx, which indeed can be moved to the SD card. None of the built-in Amazon apps are eligible. I have the option to move that app back to internal memory. I have not checked whether I can move data to the internal-storage-format SD card and then move it back because I don't want to bork the Fire tablet if it doesn't work.
Noter2017 said:
I don't really understand why you are doing all that.
7 GB is more than enough space to install plenty of apps.
Click to expand...
Click to collapse
Ha! Obviously you don't play PAD, Hearthstone, etc. Or have database apps.
ldeveraux said:
Ha! Obviously you don't play PAD, Hearthstone, etc. Or have database apps.
Click to expand...
Click to collapse
I don't play, sorry.
Isn't there a Magisk module to move .obb files to external SD? That would help with games at least
Noter2017 said:
I don't play, sorry.
Isn't there a Magisk module to move .obb files to external SD? That would help with games at least
Click to expand...
Click to collapse
Or he could, you know, do exactly what he asked about.
FireOS lack the permission in etc/permissions/platform.xml to allow applications to write to external storage on most of not all versions of the OS. Without that permission, you have to add it and factory reset or use an app like apps2sd to format the external card as internal 'for real aka adoptable storage' to be honest, I don't know if FireOS actually does this or just tells you it does.
the problem with adoptable storage is the Micro SD will only work on that device and if the device ever stops working all that data is lost so I just use root options to move apps to the Micro SD. also you can change the card to a different card without a factory reset but it will unlink the old Micro SD permanently losing all of the data on it and will reformat the new one