I use a desktop at home and (sync) backup (whenever I'm doing editing) to a 2nd internal HDD. Same deal with the laptop. I do a weekly (sync) backup for both to a 2TB WD USB-3 drive which I keep at work.
This way I have my original files, a local backup on the 2nd HDD and weekly backup offsite.
BTW I recently changed laptops and the one I inherited didn't have a 2nd HDD. I bought a optical drive caddy (ebay) and 500GB, 2.5" drive (Umart)for a total of $80. A cheap solution I think to getting piece of mind.

