: It typically achieves much smaller file sizes than standard ZIP files using the LZMA/LZMA2 algorithms.
A .7z file is a compressed archive created with the 7-Zip open-source software. It is widely used for: Boots.7z
While a specific "Boots.7z" file is not a standard system file, it appears most frequently in two areas: PS3 Emulator RPCS3 Setup Guide : It typically achieves much smaller file sizes