Move your roms to /storage/emulated/0/MAME4all/roms . When you open the app, it will automatically scan this directory.
MAME is an emulator designed to preserve arcade games. It emulates the hardware (CPU, sound chips, video circuitry) of arcade cabinets, allowing you to play original ROM dumps on modern systems. Mame V0.139 Full Arcade Set Roms Easy Install
The "Easy Install" component, however, is where the practical meets the problematic. In the raw form, a MAME ROM set is a chaotic folder of zipped files, many of which are interdependent. An "easy install" implies a pre-configured package: the correct version of the MAME emulator, the full ROM set meticulously checked for matching checksums, and often additional assets like screenshots, control panel layouts, and cheat files. For the end-user, this dramatically lowers the barrier to entry. No longer must one understand command-line arguments, ROM-cloning hierarchies (parent vs. child ROMs), or CHD (Compressed Hard Disk) file management. Instead, the user can download, extract, and launch a virtual arcade within minutes. This accessibility is a double-edged sword: it democratizes access to gaming history but also transforms a complex preservation tool into a simple "game ripper." Move your roms to /storage/emulated/0/MAME4all/roms