I had not seen or read the last two replies, but I will do it later, but in the meantime let me share what happened to my experimentation with the 2 Tb USB drive. I was able to copy my image backup to it, but when I tried to do a Restore from that location, the same thing happened as with the original file, it could not see it or find it. In view of that I decided to do a new backup of my present installation in the laptop to the USB stick which started fine by showing the backup progress window and the backup already started, but then a message window popped up saying to select a location with at least 1 Tb of space, which the USB stick had and more, so I proceeded to ignore and close that message window and see what happened, and the backup process continued in the original window, so I assumed everything was fine. After the backup was completed I opened File Explorer hoping to find 2 backups in the USB stick, but I only found one, and it was not the recent backup but the old one, the one that was a copy, so I don't know where the last backup went to. Just out of curiosity I tried to do a Restore to see if Windows would find at least USB stick location, but it didn't. So, back to square one. I don't know what this proved because initially windows seemed to accept the USB stick as a backup location and went through with the backup process except that File Explorer could not find it. So, at the moment I am not sure what will happen when I buy the 5 Tb USB drive and attempt to duplicate what I just did with the 2 TB USB stick.
I recall you said that you were able to restore from a copy of a backup, but, perhaps, your situation was different in the sense that you used the same laptop and same Windows installation to do the backup, copy the backup to another location and then restore from the copy and all that stuff you say about the shadow copy being saved somewhere in the system allowed you to do that. In may case I am trying to restore from a different Windows installation, even if it is the same laptop, I am wondering if under this situation the restoring of a copy would work.