I have a fairphone, and I just bought a 128GB sd card for it to expand my storage. I chose the "Use as internal storage" option. Now I want to do stuff like, download osmand maps onto it, download stuff onto it through newpipe, and, like, actually access the files on it through a file manager.

The thing is, I can't see the sdcard anywhere in the file manager. Using termux as root, I seem to be able to access it on /mnt/expand/q506de..... but nothing except root seems to be able to actually access that. Like, what am I supposed to do here? Should I have formatted it as portable storage? Do I need to, idk, create a folder on it, give it read/write permissions for the user and symbolic link it to /storage/emulated/0? Can I still put apps on it if I format as portable storage? Do I have to choose between storing files or apps on it?

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    Whatever files you are seeing in any file explorer app should already be on the SD card if you have done it properly: How to free Internal Storage by moving data to Adoptable Storage? Commented Dec 28, 2021 at 13:05
  • @IrfanLatif Ok, so, "migrate data" (I really wish android was more clear about what it is actually doing) would sorta work I guess. But then what happens to my phone's filesystem? There is still 64 GB there that I also would like to be able to use. The most ideal setup for me would be to have a folder on the sd card that was just accessable, is that an option? Is it a good idea to manually start mounting / linking stuff? Or wil that cause problems?
    – TT-392
    Commented Dec 28, 2021 at 13:51
  • afaik you can control install location of apps. regarding external storage /storage/emulated (aka /data/media) it's all or nothing. but as your phone is rooted you can use FolderMount
    – alecxs
    Commented Dec 28, 2021 at 19:15
  • Does this answer your question? How to bind mount a folder inside /sdcard with correct permissions?
    – alecxs
    Commented Dec 28, 2021 at 19:28
  • I guess the awnser is that it is possible if I put in the effort to do it manually, but there isn't really a proper android way. I might just end up setting it up as portable storage to keep things simple. If it retains its mount point, I might even create some links for like DCIM if that works.
    – TT-392
    Commented Dec 28, 2021 at 20:53


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