PSP systems recognize .ISO formats. If a source file downloads as an .EXE , .MSI , or password-protected .RAR file, do not execute or unpack the directory.
If you encounter websites offering a direct download link for an "Uncharted PSP ISO," these files fall into distinct, non-official categories: Uncharted Psp Iso File Download
The Ultimate Guide to Uncharted PSP ISO File Downloads: Myth vs. Reality PSP systems recognize