Amazon offers the Twelve South BackPack in Silver for iMac for $31.14. Usually, $45, today’s deal is $9 less than our Black Friday mention and the best one available. The Twelve South BackPack provides extra space for your iMac, ideal for hard drives and other storage. For a while now I have been using one and must agree that it is a pretty ingenious way of keeping things organized. It also keeps everything out of sight, not to mention. 4/5 stars rated.
Helps create an organized workspace by elevating hard drives and other peripherals off your desk
Adds a space-saving shelf that mounts to the back or front of your iMac or Apple Display
Holds up to 3.5 pounds of hard drives, peripherals – even a MacBook
Integrated cable rails allow for handy cord and cable management with integrated vertical pegs to supported hard drives
Compatible with iMac (21 and 27-inch models), iMac Pro, Apple Thunderbolt Display and Apple Cinema Display (21 and 27-inch)