: Ensure you have every file from part 1 through at least part 8 (and any subsequent parts) in the same folder.
To access the "deep content" (the original file(s) hidden inside), you generally need in the sequence. 5GBACVFF.part8.rar
If you only have part 8, you will not be able to see or extract the content, as multipart archives cannot be opened independently of their preceding volumes. Do you have the of this archive, or : Ensure you have every file from part