How to Turn a Portable Sd Card into Internal Storage Via Adb Command

How to turn a portable SD card into internal storage via ADB command?

I managed succesfully perform this operation on my LG K8 LTE. I want to notice there are "500 xxx Unknown disk" errors problems, and give solution to avoid this. Solution is very simple.
Proper steps in ADB would be:

adb shell
sm list-disks
// HERE YOU GET YOUR DISK ID, SOMETHING LIKE "disk:179,64" - REMEMBER THOSE NUMBERS
sm set-force-adoptable true
// IN NEXT LINE, SIMPLY PUT THOSE NUMBERS AFTER "disk:" AND ALSO AFTER WORD "mixed" TYPE PERCENTAGE OF SPACE LEFT AS EXTERNAL, SO IN MY CASE:
sm partition disk:179,64 mixed 60
// IT TAKES TIME. BE PATIENT. WITH THIS LINE I TRANSFORMED WHOLE EXTERNAL SD INTO 40% OF INTERNAL AND 60% OF EXTERNAL
sm set-force-adoptable false

BANG! That's it! Now go to storage and usb, there click on internal part of SD and expand options, click on "use as internal" or something like that, last option, (I cannot see what was that because I already clicked it and everything works) apps are finally going on SD with OBB files! ;)

Have a good day!

Xamarin UITest | adb cmd to open mobile phone Internal storage via mobile screen (not through adb pull command and pull the data )

As My test should run in other devices i thought to install(material_files.apk) a new file explorer (remove google files) then

1. Open Internal storage:

   adb shell am start --user 0 -a android.intent.action.VIEW -d file://storage/sdcard/" -t resource/folder
   

2. Open ABC Folder:

   adb shell am start --user 0 -a android.intent.action.VIEW -d file://storage/sdcard/ABC" -t resource/folder
   

3. Open Text File(XYZ.txt):

   adb shell am start --user 0 -a android.intent.action.VIEW -d file://storage/sdcard/ABC/XYZ.txt -t text/plain
   

Find location of a removable SD card

Environment.getExternalStorageState() returns path to internal SD mount point like "/mnt/sdcard"

No, Environment.getExternalStorageDirectory() refers to whatever the device manufacturer considered to be "external storage". On some devices, this is removable media, like an SD card. On some devices, this is a portion of on-device flash. Here, "external storage" means "the stuff accessible via USB Mass Storage mode when mounted on a host machine", at least for Android 1.x and 2.x.

But the question is about external SD. How to get a path like "/mnt/sdcard/external_sd" (it may differ from device to device)?

Android has no concept of "external SD", aside from external storage, as described above.

If a device manufacturer has elected to have external storage be on-board flash and also has an SD card, you will need to contact that manufacturer to determine whether or not you can use the SD card (not guaranteed) and what the rules are for using it, such as what path to use for it.

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UPDATE

Two recent things of note:

First, on Android 4.4+, you do not have write access to removable media (e.g., "external SD"), except for any locations on that media that might be returned by getExternalFilesDirs() and getExternalCacheDirs(). See Dave Smith's excellent analysis of this, particularly if you want the low-level details.

Second, lest anyone quibble on whether or not removable media access is otherwise part of the Android SDK, here is Dianne Hackborn's assessment:

...keep in mind: until Android 4.4, the official Android platform has not supported SD cards at all except for two special cases: the old school storage layout where external storage is an SD card (which is still supported by the platform today), and a small feature added to Android 3.0 where it would scan additional SD cards and add them to the media provider and give apps read-only access to their files (which is also still supported in the platform today).

Android 4.4 is the first release of the platform that has actually allowed applications to use SD cards for storage. Any access to them prior to that was through private, unsupported APIs. We now have a quite rich API in the platform that allows applications to make use of SD cards in a supported way, in better ways than they have been able to before: they can make free use of their app-specific storage area without requiring any permissions in the app, and can access any other files on the SD card as long as they go through the file picker, again without needing any special permissions.

Android not saving to SD card

First of all, we need to understand about what is difference between Internal Storage, External Storage (aka primary external storage) and Secondary External Storage?

Internal Storage: is storage that is not accessible by the user, except via installed apps (or by rooting their device). Example: data/data/app_packageName

Primary External Storage: In built shared storage which is "accessible by the user by plugging in a USB cable and mounting it as a drive on a host computer". Example: When we say Nexus 5 32 GB.

Secondary External Storage: Removable storage. Example: SD Card.

getExternalStorageDirectory ()

It will return path of the primary external storage directory

To access removable SD (Secondary external storage) there are below APIs:

getExternalFilesDirs(), getExternalCacheDirs(), and getExternalMediaDirs()

Check there documentation for further information

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