SAVE DATA PROBLEM

Can anyone help me please
I'm getting the message THE SAVE DATA COULD NOT BE ACCESSED. PLEASE TURN
OFF AND REINSERT THE DS CARD.
This is when I try to play games
Its not happening with every game, but it is happening often, Frustrating anyone help please

https://www.romulation.org/forum/index.php/topic,1462.0.html

Where can i find settings so i can change
save type/ back up ?

Are you trying to play the games on a flash card or in the emulator?

If no$gba etc., change the save type until it fixes the message (in Emulator Settings), or update your firmware for flashcart.