In a standard ZIP, each file is compressed individually. In a "solid" 7z archive, all files are treated as one massive data block.
Knowing the software you're using can help troubleshoot the issue.
Unlike some proprietary formats, 7-Zip is open-source and widely considered safe for distributing large software packages.
Most modern tools, including WinZip and various emulators, can now open or at least read the content of these archives directly.
The .7z extension is a staple in the gaming and emulation communities for a few reasons:
