Looking for a way to protect your backup drives (especially if you use a drop-in dock like I do) then consider these handy little cases, which protect the drive from static, dust, spiders, etc.
I personally like to get a 1 TB drive per client/project and then, when that project is done, or awaiting approval, I pull it out of the dock and put it on the shelf to work on other projects. The advantage of putting the drive in a case, aside from the protection, is that I can put some very big labels with lots of notes about what’s on the drive, which is usually a lot of stuff.