The file "gsd.7z.004" is the of a split compressed archive. Key Details
You cannot open this file by itself; it is just one "piece" of the whole. gsd.7z.004
Ensure gsd.7z.001 through gsd.7z.004 are in one location. The file "gsd
The .7z indicates it was created using 7-Zip or a similar compression tool. How to Open It you must have (001
To access the contents, you must have (001, 002, 003, and 004) in the same folder.