Right-click FMSTER21-MW.part1.rar and select "Extract Here" using WinRAR or 7-Zip . The software will automatically combine parts 1, 2, and 3.
Part 3 of a split RAR Archive (.part1.rar, .part2.rar, .part3.rar). FMSTER21-MW.part3.rar
Likely from a community site like FMScout or SortitoutSI , usually part of the FMSTER/Cutout series. Right-click FMSTER21-MW
Contains high-resolution cutout player faces (part of a megapack) to replace generic faces in FM21. FMSTER21-MW.part3.rar