If you want to play Uncharted on a handheld, you have three legitimate and safe options. None of them involve "highly compressed" mystery files.
Before you click, run this mental checklist: uncharted psp highly compressed
If a website promises an 80MB file for "Uncharted PSP," they are lying. At best, you are downloading a broken demo that crashes at the menu. At worst, you are actively installing malware onto your device. If you want to play Uncharted on a
: Note that files promising 10MB–500MB versions of a game that is natively 3.4GB on the Vita are almost certainly fake or broken. " they are lying. At best