4G here. But I can see problems coming when you have an 060 and are going to use PC ports on your amiga. The SCUMMVM games mentioned earlier or DOOM WADs. I have DOOMII and WOLF3D WADs taking up quite some space. Eventually it is possible to fill anything. But 4G is very adequate for whdgaming. It can store more than you will be able to play in your free time.