I'm building an AMD e-350 rig in a Dreamcast shell for fun and challenge but I need to know can I buy a really small internal harddrive. It has very little space inside the case so I need something small and cheap. I'm fine with an old 5400rpm like 100gb HDD or something like that it doesn't matter just needs to get the job done.
if you want speed and a drive that take a beating if the system is dropped or kicked then spend a little more for a ssd drive.
as long as the unit has clean and good power ssd are fine.