: Use a utility like WinRAR or 7-Zip. Right-click on Part 1 and select "Extract Here." The software will automatically pull data from all other parts to recreate the full setup file.
When a software package is split into multiple parts (like part1.rar , part2.rar ... part5.rar ), it is usually because the total file size was too large for a single upload. To successfully extract the toolchain: Download Tool Chain RT809F English part5 rar
How to Install RT809F Programmer Software and Toolchain Full Setup : Use a utility like WinRAR or 7-Zip