You cannot extract .010 by itself. For the extraction to work, you must have in the same folder. This usually looks like: G15B.7z.001 G15B.7z.002 G15B.7z.010 (And any remaining parts until the end of the set) Step 2: Extraction Tools
How to Combine and Extract Multi-Part 7z Archives (G15B.7z.010) G15B.7z.010
Right-click on ( G15B.7z.001 ). Important: Always start with the first file; the software will automatically "find" part .010 and the others to reassemble them. Select 7-Zip > Extract Here (or your tool's equivalent). You cannot extract