Install a tool like WinRAR (Windows) or The Unarchiver (Mac).
This file ( FSTER16026-MW.part10.rar ) is only one piece of the puzzle and cannot be opened on its own. How to Use This File: FSTER16026-MW.part10.rar
If you tell me (a game, software, a movie?) and what operating system you're using (Windows, Mac, Linux), I can give you more specific instructions or suggest the best free software for the job. Install a tool like WinRAR (Windows) or The Unarchiver (Mac)
It looks like you are working with a ( .part10.rar ). These files are used to split a large file into smaller, manageable chunks [1]. It looks like you are working with a (
Make sure you have FSTER16026-MW.part01.rar through FSTER16026-MW.part10.rar (and any others in the series) in the same folder [1].
Right-click only the first file ( .part01.rar or just the main .rar file) and select "Extract Here." The software will automatically combine all 10+ parts into the final file [1].