muOS Box Art

Pick your system folders and get a zip of box art, ready to drop onto the SD card. The art comes from the libretro archive and lands in MUOS/info/catalogue/<system>/box/, named after each game so muOS shows the cover in the list.

Step 1 — Your games

Tap a system, then pick that system's folder. Add as many folders as you like — the list builds up below. Only file names are read; your games themselves are never uploaded.

Pick the whole ROMS folder instead

No folder handy?

On the SD card

Download the zip and extract it to the root of the SD card, so the MUOS folder sits next to ROMS.
On your phone, the Files app can extract a zip — or use ZArchiver. On a PC, right-click → Extract All.
Put the card back in the handheld. The covers show up in the game lists.

Adding games later? Run this again — it only fills in the missing ones. If a game comes back missing, it's usually because the ROM filename doesn't match libretro's title; renaming the ROM to the standard name fixes it.