The following paper discusses the preservation of arcade gaming history through the Multiple Arcade Machine Emulator (MAME) and the best methods for obtaining and managing ROM packs.
That’s why downloading a (often called a "ROMset") is the best solution. Instead of downloading games one by one, a pack gives you a complete library in one go. Best Mame Roms Pack Download
for the basic ROMs and hundreds of gigabytes more if you include CHDs (hard drive images for newer games). The following paper discusses the preservation of arcade