Once you have downloaded your chosen game .zip files from Archive.org, you need to place them in the correct folder. Method A: Directly on your Android Device
Archive.org is a digital library that provides access to a vast collection of software, music, movies, and other digital content. The website allows users to upload, download, and share digital content, including ROMs files for various emulators, including MAME4droid. mame4droid 0139u1 roms archiveorg install
To recap the winning formula:
Keep files named exactly as downloaded (e.g., simpsons.zip ). Verify they are inside the MAME4droid/roms/ directory and not a subfolder. Once you have downloaded your chosen game