Save data is managed via the Content Manager app. Unlike the PS3, Vita saves are often tied directly to the application data unless backed up to PlayStation Plus online storage .
Simply paste the downloaded save folder into the dev_hdd0/home/00000001/savedata directory. Note that if the save was originally from a physical PS3, you may need to use tools like Apollo Save Tool or Bruteforce Save Data to decrypt it before the emulator can read it. Cross-Save and Progress Transfers sly cooper thieves in time save file
The location of your save data depends entirely on how you are playing the game: Save data is managed via the Content Manager app