Above
you see the Windows Explorers on the virtual drive.
The virtual drive behaves in most respects like a real, write protected drive, similar to a (big) CD-ROM. Additionally, especially for NTFS, all file attributes like ownership, security, encryption aso. will be identical to the original drive.
You can use any Windows (or DOS) Program to compare, copy or directly use the data on the virtual drive.
To the right, you see the status display with some info about the image you are viewing.
hitting the CANCEL button will remove the virtual drive from the system.
If you have installed Drive Snapshot, Drive Snapshot will be the default viewer for files of type '.SNA'; double clicking on a .SNA file will automatically mount the virtual drive, and start windows Explorer.