The following USB devices have been tested and are known to be compatible with the USB-HOST mod for SNES and NES Classic Edition Consoles.
Please report any devices not listed below! Post a comment below with the Name, Size, and Model Number and whether or not it works, and I will add it to the list.
It seems like ALL SanDisk sticks are compatible so far and they're the RECOMENDED brand to go with for speed.
ALL HARD DRIVES WORK!
This list is for USB Flash/Thumb Drives only!