: On Windows 10/11 or macOS, right-click the file and select Mount . This creates a virtual drive in your file explorer as if you had inserted a physical disc.

: Likely indicates a version number (1.2b) or a specific revision within a series.

: It could be a lightweight or "Lite" version of an OS (like Windows 7) customized for photography workstations.

Because this file name is unique and potentially from a third-party source, you should scan it with an antivirus tool or upload it to VirusTotal before opening or mounting it. How to Extract .ISO using 7-Zip (Easy Step by Step)