A .rar file is a compressed archive format developed by WinRAR used to bundle multiple files into a smaller package. When a dataset is too large for a single upload—common for high-quality FM21 graphics packs or league databases—it is split into multiple volumes like .part1.rar , .part2.rar , and so on.
: You typically only need to right-click the first part ( part1.rar ) and select "Extract Here" using a tool like WinRAR or 7-Zip . The software automatically finds and merges the data from part2 and subsequent parts to recreate the original file. Context: Football Manager 2021 Mods FMSTER21-MW.part2.rar
: To use the contents of part2 , you must also have all other parts (such as part1.rar and part3.rar ) in the same folder. The software automatically finds and merges the data