Move Save File From Flashcart to Physical Game

I want to move a save file for Pokemon Platinum from my flashcart (DSTwo) to a physical cartridge. I have an ActionReplayDSi which I know can backup games and restore them. However the problem is that the file that are backed up are 513kb .DUC files and my flashcarts saves are 512kb .SAV files. Is there any way to convert the save file or am I doing this completely incorrectly and there's an easier way?

Thank you!