His is a hot-swap cage mainly used for cases with 3 optical drive positions. This hot-swap cage uses the optical drive bay design, occupying only three optical drive bays to be able to expand the five hot-swap hard drive positions.
eBay
2.5" HDD Enclosure SATA to USB 3.0 External Mobile Hard Drive Case for Laptop PC 5Gbps Speed Enclosure SATA SSD HDD Storage Case
Aliexpress UK
Supported capacity: up to 8TB. Interface: USB2.0, USB3.0 (optional). Supported devices: 5.25 "DVD, optical drive, various 3.5" SATA hard disks, supporting DVD 16 speed recording (these hardware are not included in this product).
eBay
Drive Enclosure 5Gbps 12.7mm USB 3.0 SATA External DVD CD-ROM RW Player Optical Drive Enclosure Case for Laptop Desktop NO Drive
Aliexpress UK
Interface: External support for USB2.0/USB3.0 interfaces. Interface: USB2.0, USB3.0 (optional). Support: Internal support for various types of optical drives with 5.25 "SATA interface, DVDs, 3.5" SATA hard disks, and DVD16 speed recording.
eBay
ORICO Magnetic HDD Case 5 Bay External Hard Drive Enclosure Aluminum 3.5 Inch USB 3.0 To SATA HDD Enclosure with Build-in Fan
Aliexpress UK
NexStar DX2 is the second generation of the popular DX Optical Enclosure. Like DX, this DX2 is designed to be solidly built enclosure to house a 5.25" Desktop Optical drive and convert into an external enclosure.
eBay
Yottamaster 5 Bay RAID External Hard Drive Enclosure 2.5" 3.5" SATA HDD SSD Enclosure RAID Mode Hard Drive Storage Support 80TB
Aliexpress UK
Please examine the picture to understand its condition. Best regards.
eBay
Yottamaster HOT 2.5 Inch Hard drive Enclosure HDD SSD SATA3.0 5Gbps 10Gbps HDD Case USB3.1 Gen2 10Gbps 7-9.5mm 7-15mm enclosure
Aliexpress UK
1x SATA data cable (7-pin). 1x SATA power cable (15pin). SSD has four internal pillars on the inside of the carrier that correspond to four screw holes on the side of the hard drive. Are you looking for a professional yet affordable hard drive caddy?.
eBay
Yottamaster 3.5 inch SATA HDD Network Storage Hard Drive Enclosure NAS Private Cloud Storage with External HDD Enclosure Adapter
Aliexpress UK
Interface: External support for USB2.0/USB3.0 interfaces. Interface: USB2.0, USB3.0 (optional). Support: Internal support for various types of optical drives with 5.25 "SATA interface, DVDs, 3.5" SATA hard disks, and DVD16 speed recording.
eBay
Yottamaster 4 Bay RAID Hard Drive Enclosure USB 3.0 to SATA3.0 HDD External Hard Drive Storage Support 2.5" 3.5" SSD HDD 4*16TB
Aliexpress UK
Model Number:HDD Hard Drive Cage Rack. 1 x HDD Hard Drive Cage Rack.
eBay
Smart Display HDD Case 2.5 Inch Transparent HDD Enclosure USB3.2 Gen2 External HDD Shell SATA HDD SSD Storage Case for Laptop PC
Aliexpress UK