Manually mounted device sdd1 is ok to use (mv, rm, cp etc) from terminal commands, but from the moment onwards that I use , lets say pcmanfm or firefox to save things, for instance, it becames READ ONLY FS even to the terminal session.
It is a SAMSUNG 1TB FAT32 I'm on Arch Why is that?
dmesgto see if you can spot any errors resulting in the fs being remounted readonly. – kaylum Feb 17 '20 at 4:02