For some reason I can't figure out I can't delete files or folders in the file manager on my SD cards. I can create folders, but I can't delete them. I can not move or copy files. I continually get "Operation failed" errors.

There is no issue doing any of this from the command prompt (not as root either) or via Canoe. No other application (Notes, Xournal, etc.) has any problem writing to the cards either.

This may be causing the root issue I am trying to deal with, which is why it can't copy a file from Bluetooth. In that case, I can't even copy a file to internal memory, where I can delete files in File Manager. I'd be happy to use Canoe instead of File Manager but it does not appear to be aware of Bluetooth.

Any hints?