Tools like Clrmamepro or RomCenter can scan your 0.250 repack and verify that no files were corrupted during the download.
Many repacks focus on "ROM-only" sets, excluding the massive 500GB+ hard drive images required for 90s/00s titles, making the set more manageable for devices like the Raspberry Pi or Steam Deck. How to Use the MAME 0.250 ROM Set mame 0250 rom set repack
Each ZIP file contains every file needed to run the game. These are the easiest to use but take up the most space. Tools like Clrmamepro or RomCenter can scan your 0