Ensure the filename matches the rest of the set exactly. If part01 is named differently than part08 , the extraction software will lose the "link" and report a "Missing Volume" error.
Typically 10+ parts depending on the specific compression ratio. Format: RAR5 (Split Volume) How to Handle Part 08 Microsoft_Flight_Simulator-HOODLUM.part08.rar
Technical Guide: Managing Microsoft Flight Simulator (HOODLUM) Part Archives Ensure the filename matches the rest of the set exactly