I have been booting up some GCN backups from my USB Drive using USB Loader GX. I start the game file, and it plays fine, without stuttering or strange graphical effects, etc. But there is one problem that has been bugging me from the start: It takes around a minute or so for any of the games to load ANYTHING, i.e. when changing screens in F-Zero GX to opening certain doors in Metroid Prime 1. Not to mention the immense amount of time waiting for it to boot up in the first place. My best guess for the causes of it are the reading/writing speeds on the drive itself, but I'm not sure.
Does anyone have an idea/similar problem?