@EZ-Flash2 I think I found a particular issue with the game "Final Fantasy Tactics Advance" in regards to saving.
affected title:
Final Fantasy Tactics Advance (Europe) (En,Fr,De,Es,It)
MD5: 6EA5FC0E4B56A232AC3CBDAB4B4A6BCD
(possibly other regions).
I have noticed on my particular GBA hardware that I can see when the EZFlash omega cartridge saves to the SD card by looking at the devices power LED. When saving, it does flicker ever so slightly. I have observed the LED to be pretty much flickering the entire time when in battle.
From what I understand, the Omegas FPGA monitors the save memory area (0xE000000) and if any changes occur, the FPGA will initiate the write process to the SD, is that correct?
I have opened the ROM in mgba and fired up the memory viewer to look at the flash memory area for the title and noticed the contents "flickering" - i.e. some bytes in the area are changed for a split second, then being changed back by the game.
Could this be a cause for some people having issues/lost saves and would a workaround (similar to the one implemented in K104 FW6 for the "Fire Emblem" games) be possible?
For your convenience, I have attached a save file for the game so you don't have to sit through the 20min intro. All you have to do is enter a battle from the map screen.