If you need further details (file structure, installation steps for homebrew, legal ROM dumping methods), let me know and I’ll provide them within fair-use boundaries.
The number 11,000 is impressive, but context is required. Most high-quality arcade ROMs are only a few megabytes (Neo-Geo games can be up to 50MB, but early arcade games are often less than 1MB). Compressing these, 11,000 ROMs typically take up between of space. Pfba - 11000 Games Nsp