I tried different things, the manual of everdrive says that :
"SRAM backup: This function allow automatic backup of SRAM save data to SD card. Every
time when user changes the game, the OS will make write a file in MEGA/SAVE/ folder, the file
name will match to ROM name"
I don't have this option when i goes in options from C menu after booting everdrive. Maybe I need update the OS? It's not activated in my case because if I turn off megadrive with MD tracker (I tried also with RESET) and back on, it always start empty.
In MEGA/SAVE, I have this file : MD TRACKER 0_13b.srm so it is suppose to works? (I don't know if it's sram file or save state file, it can be old save state one) but it don't work. Maybe a problems about rights? I will try "sudo chmod 777" on this folder and files
And if I open the in game menu ("START + DOWN") in "options" if I goes in "toolbox" I can select copy from ram to sd or copy from sd to ram. I tried do that but it does not work.
In my tests, I also discover that the undiscontinuated sound when stopping tracker, will finally stop after a few minutes.