If you download a save from a website like GameFAQs or The Iso Zone , you will often get a .psu , .max , or .xps file. Your PS2 emulator (like AetherSX2 or Play?) cannot read these directly. A converts these archive formats into a raw folder structure that emulators understand.
: Users often report "Corrupt Data" errors when using Save Builder to extract files manually. It is often safer to export as a file rather than individual loose files. Malware False Positives ps2 save builder android
There is a more niche definition of "PS2 Save Builder" within the modding community. This refers to apps that allow users to modify the icon ( .ico ) and background image ( .sys ) of a save file. If you download a save from a website