I copied my save file from my Everdrive onto the Mega SD, but none of the games seem to be recognizing anything. Is there a specific folder it needs to go in, or do I need to change the save file extension?
They are not directly compatible. Everdrive always sabes the maximum size (64kb) while megasd only used size, using a larger file generally overwrites the data, that mean data must be trimmed. Also everdrive saves 16 bits, with the high byte unused, megasd saves only the used 8 bits, so even bytes on megasd saves must be skipped. Also megasd saves have a header.