Thanks for the windows test. I used the golang functions to join paths but it is os dependent and windows uses \. I shouldn’t do that for the gamelist.xml portions since the gamelist.xml will always be read on linux. I saw some issues with retropie displaying the data for roms inside folders but I’m on an older version so that might be working.

I didn’t intend for the images to require sub folders but it might be a good thing. I added support to create the single images directory to make things easier but I’ll clean up the code so you don’t have to create a bunch of extra folders either by having it create them for you or by flattening the structure.

I also researched more about megadrive roms. The documentation I saw had .md as a Multi Game Doctor file but other documentation has this as .mgd. And looking at the emulator in emulationstation they don’t support the Multi Game Doctor format only raw binary and the smd format so I will assume .md is actually the raw binary like .bin and .gen. I also fixed the smd block size and it appears to be working.

The next things I’ll work on are fixing the issues that ceuse has found then add .zip support.