I regularly back up using Rescue and Recovery. It says: "Saving an image of your system to your USB external storage device." I haven't found a way to get any clue about what is included in the image. I can't select properties of the backup, or find out what the size is.
I've also tried google, and of the new info, none of it was useful.
Does this backup include both drives, C and D?
And it seems that this backup is just to do a restore on the same computer. If I even replace the SSD with a larger rotating hard drive, I don't suppose I'd be able to use the restore, would I?