Hacking Problem with my EWIN flash 512 mbit

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So when i put a rom on my Ewin 512 flashcard, and i put it into my GBA and try to play the rom, it always says "Unknown save type" on the bottom. This happens with every rom i try to play. I have no idea how to fix it, please help me thx.

And sorry if there a topic like this already posted, i already done a search in the forums and cannot find and topics related to my problem.

Thx

 

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Please someone help me i still cannot figure out this problem

Thank You