Thank you so much. I have a group of 4 friends having this issue. Have a 5th friend that has a WD Passport which I normally use 90% of the time previously Wii setups. Non of the others are WD Passport. My HDD is a WD but in a genetic 2.5" enclosure that I've had for two years but recently...
Thank you for posting this. I have this issues on my Wii and could not find any documentation.
EDIT:
Wii uses MAME2000 (0.37b5), RetroArch 1.7.6. Had to place the sounds "samples" folder in the same directory as ROMs and requires compatible ROMs and samples files too.
Wii (not WiiU)
MAME2000...