D: Whut?! Non writable!!!!

[f0ckdroid]

I want to transfer over some files back and forth to my Thumb Drive and Tablet. I can copy from my thumb drive but I cannot transfer anything over to thumb drive from tablet. It says "non writable" with all of my thumb drives and external usb drive.
why it no want tablet files?
Is this a android thing? a app thing? or is it only a omputer in the middle sharing files thing? :/
I really need to transfer my downloads to my thumb drive.

 

[chanchan05]

I had an odd experience where FX File Explorer saw my SD card as unwritable, but using My Files app I was able to write on it. Try using a different file manager app.