Some sites simply rename old files. You might download a 700MB file thinking it’s WWE 2K21, only to load up your PPSSPP emulator and see WWE SmackDown vs. Raw 2011 . Frustrating, but common.
Based on typical community releases like those from RisTechy : ~1.3 GB to 1.6 GB. Full Data (with Textures): Up to 3.2 GB. Platform: PSP / PPSSPP Emulator (Android, iOS, PC). How to Install (PPSSPP) wwe 2k21 psp iso new