Rts0003.7z.002 -

: copy /b RTS0003.7z.001 + RTS0003.7z.002 RTS0003_joined.7z Linux/Mac : cat RTS0003.7z.* > RTS0003_joined.7z

: If an extraction tool fails, you can manually join them using the command line: RTS0003.7z.002

: Ensure you have all the related files in the same folder. You must have RTS0003.7z.001 at a minimum. If there are more, they will follow the pattern .003 , .004 , etc.. : copy /b RTS0003