: Right-click the file and select "Extract To" to view its components.
: This likely stands for a "Hotfix" or "Hardware Update" (hz) followed by a version or date stamp (1112). sc19603-hzdupd1112-rar
If you have this file and need to see what is inside, you must use a dedicated extraction tool, as most operating systems do not support RAR files natively. : Right-click the file and select "Extract To"