I upgraded my Sony Bravia 2015 4K to Marshmallow, and now Mame4Droid can no longer find the USB thumbdrive that I use to hold my ROMs. It used to be browseable under /storage/sda but now /storage only contains "emulated" and "self", both of which are empty.
Does anyone know what path represents USB storage in Marshmallow?
I found the problem! My USB drive was formatted as exFAT, which is now completely broken on Marshmallow (WTF?!??!?)
I reformatted as crappy FAT32 and I was able to browse it at /storage/<weird identifier>, but being that it's FAT32 it took like 5 minutes for all of my ROMs to scan. I hope Sony fixes this soon!