Question OS image file gets hidden when I boot normally in Windows 10 ?

[devendrapitale]

I made an OS image backup successfully using Hiren's BootCD --> Disk Genius Utility.
This image file size is 10GB on my D drive.
Before creating this backup the free space on the D drive was 70GB.
When I boot normally in Windows 10, the image file is not there like someone has deleted it, and
the D drive free space is still 70GB as it was before creating the image file.

But when I boot using a USB Pen Drive, the file is still not visible but the D drive free space is 60GB, so the backup file must be there somewhere.

So how will I be able to restore the OS from this image file if it is hidden?

Please help me find a solution.
Thanks