NDS ROMS SAVING......

Hi people, I would appreciate if someone could spare a few moments to lend me some advice. I am currently using a M3 DS REAL CARD. The problem is I am unable to save after playing some of the games yet I am able to save other games. I just wondered if I am required to leave a certain amount of free space on the card to allow for saves during game play.I am new to all of this so really I am lost. Thanks for your time. ;D

Yes you should leave at least 10MB (safe in my opinion) so saves have enough space to be created and updated regularly.

My nds emu does not save properly can anyone tell me why this happens.

yes. you need extra space for saves.......i play a lot of ds games, so i have over 80+ mbs of save files.but if you only play a few games, then you only need a 10 or so mbs like anandjones said.