: Right-click on RedBracelet.7z.001 and select 7-Zip > Extract . The software will automatically detect and pull data from part .004 as needed. Command Line (Alternative) : Windows : copy /b RedBracelet.7z.* RedBracelet.7z Linux/Mac : cat RedBracelet.7z.00* > RedBracelet.7z

Do you have the (.001 through .003) to extract the full archive?

: Ensure you have RedBracelet.7z.001 , .002 , .003 , and .004 in the same folder.