due to arcade ROMs having multiple files, which often are redumped or renamed, It's already time-consuming uploading this at it is, don't count on me to do that work, you might try find those somewhere you're using retroarch, I recommend to use the split ROM set if you want the complete ROM set, but if you want a selective list of ROMs, you are better off using the Full Non-Merged Candle You can't go wrong with RomVault or Neo it's updated very often, sometimes daily, so learning how to use a ROM manager tool it's mandatory, my preferable tools are clrmamepro and romvault, rescan and rebuild the ROM set you have, and just download the new files, there is no need to download everything Arcade ROM sets are hard to maintain. I recommend you learn how to use a ROM manager tool, rebuild your ROM set, and then just download the newer files. organizing and uploading monthly folders it's very time-consuming, and it increases the chances of messing up the files.
These updates, some files are added, some removed and some renamed.