the only way to use a usb for brawl mods is to use riivolution but that has not been made for current brawl mods cause of the fact that brawl mainly supports sd cards. there is also the fact that using a usb drive with riivolution is far slower then using a sd card and sd cards have a tendency of taking a minute to load mods. this is cause the wii hardly if ever uses the usb ports for games. there is also the fact that most brawl mods only use on average 2gb at most 8gb on the rare occasion due to the limits present in brawl's files keeping the size of most files pretty low meaning whats the point when you can get a 4gb sdhc card for for 4-6 U.S bucks. then there is also the fact that some people use the ports for harddrives to install wii games from the disc to the harddrive (unless your a pirate in which case you know what you will be doing instead.) rather then trying to force brawl to use files from a place that it does not normally read from
