Thanks for the responses.
I selected my external hard drive (J: in my case) as the destination for the backups. And that is where they were sent to. I see files that look similar to what whs showed above.
But the other drive (K

is listed under Computer along with my C: drive, D: drive and the external drive J:. It does ot have backup files in it, it looks like it contains the exact same folders as my C: drive.
Can I delete it? Was it maybe created temporarily during the back up but Reflect failed to delete it for some reason?