OMG I like to complicate my life ! Sorry for the inconvenience. I will read more the docs from now on. When I think about it... I learned a lot from my negligence. It can be enjoyable to look outside the box.

@yussafm Good questions. Easy to try a few tests on your own, as not everyone is using it the way you propose. My advice is to avoid folders by letter, as Emulation Station lets you easily jump directly to letters, you can page up page down, and with recent enhancements, there are many ways to build your own custom game lists (and using that technique, you could add favorites, make lists by letter, etc.).

As for timing, I think you will have to do some of your own tests. There are factors like your SD card speed (or whatever you are using to store your ROMs). I would expect it to affect boot times somewhat, as the ROM lists are gathered, but you will have to try it and find out if it's acceptable for your needs. Maybe someone else will reply with their specific examples. My loads are very fast, but I only have a few hundred ROMs.

Well go to retropie,then go to file manager,now go to retropie,roms,(the console where you added roms),and check if they are there...if you have the roms in archives,that means the console deleted the direct access,to go to roms again,go to a snes game plsy it and click select and x at the same time,this will open a menu,push b and select settings,video,video filter,then select /,home,retropie,roms and the console,then select the game,select browse archive and select game file.

I got the same problem,i made that,but now the problem is that my disk is write protected...and if i use a new usb,the archives aren't there...