Locate a reputable gaming forum or retro gaming archive. Download the .zip or .rar file containing the save data.
A PSP save data file is essentially a digital snapshot of a game at a specific point. For Ben 10 Ultimate Alien: Cosmic Destruction , these files usually come in a specific folder structure. Inside, you will find files like PARAM.PFO (which contains the metadata like the save icon and title) and DATA.BIN (which contains the actual game progress). ben 10 ultimate alien cosmic destruction psp save data