I have a few Seagate external HDs. Previously, I had other discs (that failed!) but these seem quite good.
They come with a Seagate backup management system that you run - it wanders off and makes a backup of your PC/Laptop and promises that it will be available for restore if you need it.
My experience, admittedly some years ago, was that these proprietary systems make a sort of encrypted backup which requires their systems to restore. No software, no restore. My B-I-L had exactly that problem last year. Backed up using some particular software and when he needed to restore, got some computer speak for "not possible"
What I've done with my current externals (one in my home country, one here on the boat) is copy my photos, my music and documents from the laptop to the Drive, file by file. This is irritating when I want to refresh the back up because all I want to do is save the changes across, not the bulk of the originals.
Why do all these programs insist on backing up in some obscure code format and not simply file-to-file. If it was file-to-file, I could go get a file I accidentally deleted etc.
Why make things complicated? Or is there a $$$ issue here I am missing?