And if you want one enclosure that could house them all instead of having multiple drives hanging off the back of your iMac. Yottamaster Y-Pioneer Series enclosure will be works perfectly for you. Equipped with a versatileUSB3.0 Type-B interface to connect other peripheral devices.
eBay
2.5'' External Hard Drive Enclosure USB 3.0 to SATA III Tool-Free Clear Hard Disk Case for 2.5 inch SATA HDD SSD Support UASP
Aliexpress UK
Slim USB 3.0 To SATA 2.5" Hard Drive SSD Enclosure External HDD Caddy Black UK. The USB3.0 interface, you can read & write large files 10 x faster than before. 2.5" USB 3.0 SSD/HDD Enclosure. - Sata Connections - SATA III connector, supports all SATA I/II/III hard drives.
eBay
RAGEER Aluminum M.2 NVME SSD Mobile Hard Drive Enclosure, USB 3.2 Gen 2 10 Gbps to NVME M-Key/(B+M) Key SSD Enclosure, Push-Pull
Aliexpress UK
SABRENT SSD Enclosure, Hard Drive Enclosure, Super Fast Data Transfer 2.5 SSD Enclosure, Support UASP, External Tool-free SATA Enclosure, USB cable included (EC-UASP).
eBay
USB Type C SATA HDD Case 2.5inch Hard Drive Enclosure Case USB 3.0 3.1 Laptop SSD External Hard Disk Box Plug Play
Aliexpress UK
【USB C Daisy Chain 270TB Monster Capacity】This 5 bay usb c hard drive enclosure supports 5 hard drives with a maximum capacity of 90 TB(18TBX5). Applicapable to Windows, Mac OS and Linux devices.
eBay
2.5" External Hard Drive Enclosure with USB 3.0/3.1 Interface Supports up to 6TB Fits 7mm/9.5mm SATA SSD/HDD for Laptop PC
Aliexpress UK
The hard drive enclosure is black in colour with white decal on the side stating '2.5" SSD / HDD External Case'. 1 x USB 3.0 SATA Hard Drive HD Enclosure. 1 x USB cable. Supports hard drives up to 3TB in capacity!
eBay
US Plug 3.5-inch 2.5-inch External Hard Drive Enclosure SSD USB 3.0 to SATA Hard Drive Docking Station 20T
Aliexpress UK
USB 3.0 External 2.5" SATA HDD Hard Drive Clear Case. - Connects a 2.5" SATA HDD/SSD to your computer through an available USB port. -This caddy will only work with 2.5" SATA drives. - Tested capacity up to 2TB on 2.5” SATA drives.
eBay
USB3.1 External HDD Case 2.5 Inch Hard Drive Enclosure Fast 5Gbps USB to Micro Type-C SATA HDD SSD Storage Case for Laptop PC
Aliexpress UK
About ORICO. 1x ORICO hard drive dock. We value your support and look forward to serving you! M.2 SATA SSD. 2.5" SATA SSD. SSD Heat Sink. M.2/mSATA SSD Enclosure. 2/5 Bay USB3.0 Model.
eBay
2.5 3.5 inch HDD Case Type-C & USB3.0 Hard Drive Enclosure SATA to USB 3.1 External Hard Drive Reader 20TB Adapter for PC Laptop
Aliexpress UK
eBay
4 Bay Hard Drive Enclosure Sata to USB 3.0 External Multi-Bay 2.5& 3.5 Inch HDD SDD Docking Station Hard Disk Box Multiplication
Aliexpress UK