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By DarkFlare69, Dec 23, 2014
2,415 3 0
How big would a psp iso be?
Varies. Anywhere from less than 50MB to around 2GB, I believe.
Max possible size is filing system size limit
max so far as I know so far
FF-0 merged ISO's 2.65 GB (2,855,579,648 bytes)
UMDs were up to 1.7GB, most major games are going to be around 1 - 1.6 GB. There's a lot of variation though and a simple game like Final Fantasy 1 is 188MB while Chinatown Wars is 862MB.
But there's also some leeway because images can be compressed, and people used to distribute ripkits which would downsample video+audio or cut useless content like language packs to significantly reduce the file size.