Right-click on gsd.7z.001 (the first part).
Ensure gsd.7z.001 through gsd.7z.004 are in one location.
Large files are often broken into smaller "chunks" (like .001, .002, .003) for easier sharing or storage.
The file "gsd.7z.004" is the of a split compressed archive. Key Details
To access the contents, you must have (001, 002, 003, and 004) in the same folder.
You cannot open this file by itself; it is just one "piece" of the whole.