Because .7z files can serve as containers for various types of data, including executables, you should exercise caution if the source is unknown:
: Reference files for "filling" volumes or toolpath patterns. t6666-fills.7z
: "Fill" datasets used to test database performance or integrity. Because
The term "fills" is commonly found in several technical niches, which may indicate what is inside: t6666-fills.7z
: Pattern or texture fill libraries for design software. Security and Safety