Duplicate folder entries in "This PC"

Inspiron 3511, Windows 11 Home (c/w Group Policy), UEFI

The account is MS but I'm signed out.

I'm trying to get a backup of the System State (Win7) to a seldom-used Seagate 1 Tb external HDD. I had to (successfully) convert the partition style to GPT. It shows as healthy. I did, at some point in the attempts install and run Mini-Tools Shadowmaker (backup tool).

If I plug in a flash drive I get 2 entries > same issue. When I attempt the System State backup I get not enough space which is ridiculous. Apparently it can find either D: drive to backup to since there's a disk management error in place.

Since this is not my machine I'm slow to mess with the internals via Regedit or Command Prompt without some clear understanding of the potential downside risk. Any help is appreciated.