Hi ticktock
The image you mentioned is a backup of Genos, and is on the HD of my computer. I made it using the USB storage Mod method, I copied all the USER memory folders from the keyboard to my HD on the computer.
You can see the whole folder structure in the picture in my #4 post on this topic; STYLE - REGIST -SONG - TEXT - VOCIE .... The STYLE folder is a root folder and contains 14 subfolders (larger red box). In the first three subfolders there are new subfolders and so on to Zeroo_Style where again I have 200 Folders with 404 files.
In the same way this structure is set up in the keyboard, I just copied it to the computer. All subfolders in the Style root folder were created and copied to them. When the keyboard is brand new and USER is empty, then there is only a root folder.