WD My Passport Ultra
I have a very basic back-up workflow, but for my level of work it suits me fine.
I actually use Amazon Cloud for my personal RAW files, but do not upload any Catalogue or Video files as they consume the allocated 5Gb space, however images files such as RAW and JPG’s are unlimited.
I then also use Western Digital – My Passport Ultra 2TB USB 3.0 HDD’s for my archives and back-up.
There are other back-up solutions such as Drobo, however using these portable drives works well for me as once they fill up, I keep one onsite with me and pass off another to a family member to hold offsite.
I merely work off of one, and make a copy onto the other drive.
Try Amazon Prime for various other services such as video and music, alongside the unlimited Cloud storage for photos.