Mame 2003-plus Reference: Full Non-merged Romsets 'link' -

It is highly recommended to build this set using ClrMamePro.

Because a non-merged set duplicates parent data into clone files, it is larger than split alternatives. mame 2003-plus reference: full non-merged romsets

And so, in the quiet corners of the internet, on tiny handheld devices and living room RetroPie machines, MAME 2003-Plus and Full Non-Merged ROMsets live in harmony. The emulator provides the speed and compatibility; the ROMset provides the simplicity. It is highly recommended to build this set using ClrMamePro

A means that every single game title in the MAME 2003-Plus library is a standalone file. Why Choose a Full Non-Merged ROMset? mame 2003-plus reference: full non-merged romsets

All clone files and parent files are zipped together into a single archive named after the parent game. Pros: Saves disk space.