I've got a 128Gb Lexar USB flash drive attached to my Mi Box, and I cannot get any app to write to it. (Reading from USB works just fine). Kodi/SPMC cannot create a new folder in the external drive (The option is greyed out), neither can any add-ons save files to its folders. Copying and pasting via ES file explorer fails. I have changed the file system from exfat to Fat32 and NTFS using gparted in Ubuntu with no luck. It seems there is a bug somewhere that makes writing impossible.
Off course using adoptive storage is a waste of time. The flash drive is not available for apps to write to afterwards.
Please does anyone have a way to get around this?
Apparently, it is set to be fixed only once Android 7 Nougat arrives.