I have the 8bitdo adapter bur use it on my Switch, haven' t tested on the Classic and yes the drives are picky always on the front USB port unless you mod the motehrboard (very easy but still modding), buy a USB HUB with external power or use the OTG cable I mentioned. Here is mine with a sandisk blade 128gb:Thanks for link!
I've installed BleemSync though, sorry just to confirm, it's still picky afterwards though?
What I did is get a 8Gb, did the BleemSync ok stall and works.
Then copied from the 8Gb to my 64Gb Cruzer fit all the files, tried booting but it didn't work. So even though BleemSync installed, it's still picky with USB drives?
Am I correct in reading that you can't use a DS4 in BleemSync either.... I've just bought a 8bitdo to work as well worked on non-moddee classic