Thanks for taking the time to test it again.
I tried an old Kingston 2GB made in Taiwan (the slow ones) and was able to save and load with no problems.
Still no luck with the Adata which freezes as soon as I try to save.
I even found a way to make it crash without the need to complete a mission...
Thanks for the answer,
RTS and soft reset are disabled,default settings were not changed and there are no .opt and .cht files associated to the 645 ROM, just the .nds and the .sav file that is created on first run in the root folder of the Micro SD.
Had a similar problem.
In my case formatting the SD card with Panasonic SD formatter enabled the M3i Zero to read the F_CORE.DAT from the root of the SD.
You said that you formatted your cards but maybe not with Panasonic SD formatter give it a try and see if it helps.
Update: to rule out possible incompatibility with my Adata 8GB Turbo (class 6) SDHC I tested 645 on a Supercard DSOne using the Adata SDHC and it plays just fine saving and loading with no problems.
So it seems this is definitively a problem with the M3i Zero software but still it would be great...
Just got an M3i Zero upgraded to latest firmware running with latest Sakura & Touchpod.
Did a search on the forum before posting and confirmed the problem with 777 freezing on loading.
According to the post 645 instead should work fine.
In my case 777 freezees on loading (both Sakura and...