However, the term "highly compressed" usually refers to two different things in the emulation world: and Asset Stripping. 1. Archive Compression (The "Re-Pack")

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Works, but manage your expectations. No shortcuts for emulation.

There is a distinction between and Highly Compressing .

You can right-click your RPCS3 "dev_hdd0/game" folder, go to , and check "Compress contents to save disk space." This uses your CPU to decompress files on the fly. It won't give you 90% savings, but it’s safe and doesn't break the game. Avoid ".ISO" for RPCS3