Ss-tas-015_s.7z.001 -

7zip file with numbers on it like 001 means that you only have a part file of the whole compressed file. Microsoft Learn

: While the exact content of "SS-Tas-015" isn't explicitly public, this prefix is often used in online communities for categorized media or software sets. How to Open and Extract To access the files inside, follow these steps: SS-Tas-015_s.7z.001

You can use 7-Zip on any computer, including a computer in a commercial organization. You don't need to register or pay for 7-Zip. How to Extract .7z.001 files - Microsoft Q&A 7zip file with numbers on it like 001