I have a android box that has termux and I would like to add permission for my user to write to a plugged in usb pen drive.
For what I believe I only have to add that user to sdcard_r group, I'm not really sure if this is the way. How can I achieve this? I can't find useradd command.

I also have tried using the termux-setup-storage command but this command doesn't seem to create a folder for my usb pen drive.

My android version is 5.1.1

1 Answer 1


I have followed the tutorial in http://www.cnx-software.com/2012/08/26/how-to-allow-apps-to-write-files-to-usb-mass-storage-devices-in-android/ and now I can write to my usb :)

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