Many .7z files from private sharing sites are password-protected. If you cannot open it, look back at the original source (the "readme" file or the forum post) for a password often provided by the uploader.
: Check the specific forum or site (like Nexus Mods or Reddit) where you found the link. Usernames like iza9 are active in gaming and transcription communities. Iza9.7z
: Use the official 7-Zip utility (Windows) or The Unarchiver (macOS) to open the file. Iza9.7z