If you are looking at a file ending in .c24 that you are trying to extract like a normal ZIP archive:
The .c24 file extension was historically used by PowerQuest Drive Image , an old hard drive backup and cloning software. C24zip
Yamaha bundles its official firmware and software operating system updates for this specific hardware device as a compressed ZIP file—most notably titled prc24y_v102.zip . If you are looking at a file ending in
Engineering libraries or suppliers often package massive folders of CAD drawings, Revit files, or structural spec sheets relating to C24 timber grading into a single ZIP archive for easy sharing. .c02 ... .c24 ).
When creating large backup images, the software would split massive files into smaller chunks (like .c01 , .c02 ... .c24 ).