So you are looking for an iMac accessory that lets you store hard drives and peripherals behind your computer conveniently? The Twelve South Backpack for M1 iMacs has you covered. It elevates hard drives and cables off your desk and has a strap to stop them from moving.
This Twelve South Backpack is made for the 24-inch M1 iMac. It has an aluminum design to match the design of your Mac. You can clip it on your computer without any tools. The iMac Backpack is great for hard drives but you can also use it to display business cards and your brand.[where to get it]