"System" using 342GB storage? I have a Samsung Galaxy S7 Edge in which I put a 400GB SanDisk micro-SD card to expand its storage space. Seems that didn't work though. The space is not available to me. And I can't really figure out why or how I can make this space available.

When I inserted the SD card, I selected that this SD card needs to be adopted as internal storage (I don't intend to take it out any time soon). And I had Android reformat it as it likes. However the storage app seems to be confused or the partitions messed up.

Bottom line, I'm not able to take more photos or transfer more music onto the phone because it's running out of storage.

Here's what the "Storage Settings" settings menu says about my disk usage:


367GB total used of 728GB


Internal shared storage: 366GB used of 367GB

Apps: 845MB


Images: 483MB


Videos: 0


Audio: 19.50GB


System: 342GB


Other: 3.17GB


Cached data: 112MB

SanDisk SD Card: 0.96GB used of 361GB

Apps: 2.71GB


Cached data: 40.42MB




Bold is my highlight. I don't understand why System is using 342GB or why it's counting the SD card double (the phone itself comes with 32GB built-in storage). Why is it not letting me store these files on the SD card?

I have Termux installed and here's the output of the df command:

Filesystem       1K-blocks     Used Available Use% Mounted on
rootfs             1680128     4560   1675568   1% /
tmpfs              1816220      448   1815772   1% /dev
tmpfs              1816220        0   1816220   0% /mnt
/dev/block/dm-0  378585556  1006608 377562564   1% /mnt/expand/612126b2-7bab-4bf8-8a24-ebacec5b0c23
/dev/block/sda14   4233152  1095448   3121320  26% /system
/dev/block/sda15    197472      188    193188   1% /cache
/dev/block/sda18  25772320 25243840    512096  99% /data
/data/media       25772320 25243840    512096  99% /storage/emulated


So I understand that this /storage/emulated is the one that's full, but somehow in this /dev/block/dm-0 there is this 377.6GB of space being unused. How can I make that space available to me? I've got ADB installed on my computer if necessary. It seems that the only thing saved on the SD card is several apps.
The answer was found through a comment by Irfan Latif here: &quot;System&quot; using 342GB storage? While I'd found this question prior to posting my own, I had dismissed it as being inapplicable since my df output is very different, and I hadn't found the menus shown in the screenshots there.

What I had to do is to go to Settings -> Storage -> The (almost empty) SD card. Then click on the grippy 3-dot menu in the top right, and select Migrate. You then get into the menu mentioned in the above answer (which was apparently supposed to show up when first installing the SD card, but didn't show for me). I moved the content, which took 15 minutes or so. And since then my phone indicates:


Internal shared storage: 344GB used of 367GB
SanDisk SD card: 26.32GB used of 361GB


When plugging in the phone, it now also indicates 334GB available space, and I can load more music and take more pictures.

Thank you for the suggestions, everyone.