Typical contents of a J-Stars Victory VS PS3 save file (high-level; exact file names and internal formats are not publicly documented by the publisher):
Save data from the Japanese version (BLJS10239) will NOT work with the Asian English version (BLAS50730) or vice versa, even if you use the same PSN account. The game’s title ID is embedded in the save’s header. Attempting to force-load a mismatched region save results in the error: “There is no save data that can be used” or “Save data is corrupted.” j stars victory vs ps3 save data
Sony tried to remove PS3 store functionality, and while it's still up (for now), the online features for J-STARS are ghost towns. Here is how to protect your data: Typical contents of a J-Stars Victory VS PS3