PS3 saves are typically locked to the user profile that created them. If the save doesn't work initially, you may need a tool like the Apollo Save Tool Bruteforce Save Data to "resign" the save to your own profile ID. Cross-Save:
You cannot simply drag a downloaded save onto your PS3. Sony uses encryption tied to your PSN account ID. Here is how to use on an unmodified console:
: A full bank of currency for additional shop items.
: Instantly access all playable and support characters without spending the standard 2,500 J-Points per character in the J-Point Shop.