These often house "non-good" sets—files that didn't fit into a standard regional release (US/EU/JP), such as fan translations, hacked versions, or prototype ROMs for systems like the NES, SNES, or MAME.
LZMA/LZMA2 compression , which offers a much higher compression ratio than standard ZIP. various2.7z
Large collections are often split into multiple volumes to stay under file-size limits for hosting services. various2.7z would be the second installment of a massive library of oddities. 3. The "Mystery Box" of Data Hoarding These often house "non-good" sets—files that didn't fit
It’s a form of digital archeology. Opening the file is a gamble; you might find a rare collection of 2000s-era web icons, a defunct forum’s SQL database, or just a thousand copies of the "All Your Base Are Belong To Us" GIF. various2
Within communities like r/DataHoarder, such files are sometimes shared as "mystery packs."