1. Make sure that the reset check box is enabled in the settings.
2. Run the game with boot with addon.
3. Save from the game.
4. Press the L+R+START button at the same time.
5. Select RESET as the direction key and press A.
When you return to...
There seems to be a problem with the sd card.
Replace with a reliable brand such as Samsung or SanDisk.
----------
I forgot you were playing Hackrom.
Try manually selecting the save type with FLASH128 before running.
You can use the addon reset function to know if the battery is a problem or not.
If saving fails even with the reset function, there seems to be a problem with the s71 chip.
In some situations, it might cause recognition issues, but the solder on the pin shouldn't be a problem.
Considering the photo, here's what I would do
1. I would test the pins in the SD card slot with a multimeter to make sure they are not...