Just created a recovery Backup on Samsung software as samsung computer it saves a current copy of the C Dive to an image on my external drive ...think that should suffice?
Yes and no. Beings the external is a mechanical device, it does have it's faults. You could also burn the image to disc if your PC/laptop has an optical drive (just in case the external fails at some point) < That happened to me once.
I always make more than one backup for recovery out of habit. My son made the mistake not to do this and it cost him $200+ to have ASUS reload the hard drive for him after a nasty file infecting ransomeware travesty that also infected his external. I think he learned his lesson.
What is the CoA?
Ooops! Sorry. The COA (Certificate Of Authenticity) is the little paper sticker with the product key on it found on previous versions of Windows. The product key is the string of 25 characters that you need to activate windows.