My Spyro the Dragon files are ~ 300MB, Crash Bandicoot is ~ 500MB, Metal Gear Solid is ~700MB. Final Fantasy games are considerably bigger. WipEout is only 91MB.
Depends completely on the game. Max file size for a PSP game is 1.8GB, but the biggest I've seen is GTA Vice City which was ~1.6GB. Comparatively, Sonic Rivals is ~200MB.
You're gonna need space; and 32GB is a good investment (I have one). Whether you're willing to cough up the price or not depends on you, though.







