It is that big if you fill it with MSU audio. I’m tellin ya man, the MSU hacks are pretty great. Zelda LTTP with orchestrated music in CD quality is beautiful. Same with Chrono Trigger.
Also if you’re using the Smokemonster romset, there is a lot of dupes because they have multiple sorting folders of genre types, top xx lists, includes all the translations and BS games. Ideally it would be great to have some sort of linking, or even metadata feature so you wouldnt have to duplicate Roms just for sorting, but it’s the best solution for now and the hardware supports the storage space.