Download and install the free software from the official 7-Zip site. Extract: Right-click the #BEST_15.7z file. Select 7-Zip > Extract Here or Extract to "#BEST_15" . Alternative Methods
What are you using (Windows 10/11, macOS, Linux)? #BEST_15.7z
To extract or "produce" the contents of a #BEST_15.7z file, you need to use 7-Zip software or a compatible utility. Download and install the free software from the
Install p7zip-full ( sudo apt-get install p7zip-full ) and use 7z x . #BEST_15.7z