Stw4sh5tr45j3d-pl4k.part4.rar Site
This usually means one of the parts (likely part4 in your case) didn't download correctly. Delete the file and download it again.
If any part is missing or has a slightly different filename, the extraction will fail. STW4SH5TR45J3D-PL4K.part4.rar
Download and install (official) or 7-Zip (free/open source). Windows' built-in "Extract All" feature often struggles with multi-part RAR files. Start from Part 1 Right-click only on STW4SH5TR45J3D-PL4K.part1.rar . Select "Extract Here" or "Extract to [Folder Name]" . This usually means one of the parts (likely