While I cannot browse the private contents of individual personal archives, files with this specific naming convention usually contain (images or videos) related to a specific theme or creator.
A large collection of .jpg , .png , or .mp4 files. Indiscreet Mother collections.7z
.7z is a high-compression format. You will need a utility like 7-Zip or WinRAR to open it. While I cannot browse the private contents of
The "collections" suffix suggests the content might be organized into sub-folders by date, set name, or specific sub-themes. Technical Notes on the File Indiscreet Mother collections.7z