Every long-time monster hunter has a story of a corrupted save file after 150 hours. Corruptions can occur from sudden power loss, faulty memory sticks, or emulator crashes.
To move your progress between a PSP and an emulator, follow these steps: Locate the Folder : Find the folder named on your source device. Copy the Entire Folder monster hunter portable 3rd save data
Are you looking to from another game, or are you trying to transfer your file to a different emulator/console? Data Transfer Bonuses? - Monster Hunter Portable 3rd Every long-time monster hunter has a story of