: Right-click the SS-AleTS-001_v.7z.001 file.
While "SS-AleTS-001" does not refer to a widely known public software, this naming convention is common in several specific circles: SS-AleTS-001_v.7z.001
: Large game assets or ROM sets are often split into .001, .002, etc., to make them easier to download. Troubleshooting How to Extract .7z.001 files - Microsoft Q&A : Right-click the SS-AleTS-001_v