![What is the purpose of this 4-pin interface on SATA HDDs and why doesn't it exist on SSDs? - Super User What is the purpose of this 4-pin interface on SATA HDDs and why doesn't it exist on SSDs? - Super User](https://i.stack.imgur.com/oZYUu.png)
What is the purpose of this 4-pin interface on SATA HDDs and why doesn't it exist on SSDs? - Super User
![Avolusion HDDGear 5TB USB 3.0 External Gaming Hard Drive (for PS4, PS4 Slim, PS4 Slim Pro) - 2 Year Warranty - Walmart.com Avolusion HDDGear 5TB USB 3.0 External Gaming Hard Drive (for PS4, PS4 Slim, PS4 Slim Pro) - 2 Year Warranty - Walmart.com](https://i5.walmartimages.com/asr/dab8ea2f-2f2e-442f-98b7-406deba614ca_1.902e1af65a59532fcedd1e7ae39f9d5b.jpeg?odnHeight=612&odnWidth=612&odnBg=FFFFFF)
Avolusion HDDGear 5TB USB 3.0 External Gaming Hard Drive (for PS4, PS4 Slim, PS4 Slim Pro) - 2 Year Warranty - Walmart.com
![Seagate 2TB Game Drive for PlayStation 4 Portable External Hard Drive USB 3.0 (White) Officially Licensed - Walmart.com Seagate 2TB Game Drive for PlayStation 4 Portable External Hard Drive USB 3.0 (White) Officially Licensed - Walmart.com](https://i5.walmartimages.com/asr/0730f6d3-5f45-4bec-885b-7093fa20fa24.64ba7397469797eb739c8116ca9ff1cf.jpeg)
Seagate 2TB Game Drive for PlayStation 4 Portable External Hard Drive USB 3.0 (White) Officially Licensed - Walmart.com
![China Ec21 Style Wd Hard Drive Purple 4tb HDD for Security CCTV NVR or DVR SATA - China PC HDD and Computer HDD price China Ec21 Style Wd Hard Drive Purple 4tb HDD for Security CCTV NVR or DVR SATA - China PC HDD and Computer HDD price](https://image.made-in-china.com/2f0j00IDGfswRSLyqN/Ec21-Style-Wd-Hard-Drive-Purple-4tb-HDD-for-Security-CCTV-NVR-or-DVR-SATA.jpg)
China Ec21 Style Wd Hard Drive Purple 4tb HDD for Security CCTV NVR or DVR SATA - China PC HDD and Computer HDD price
![Amazon.com: Seagate BarraCuda 4TB Internal Hard Drive HDD – 3.5 Inch Sata 6 Gb/s 5400 RPM 256MB Cache For Computer Desktop PC – Frustration Free Packaging ST4000DMZ04/DM004 : Electronics Amazon.com: Seagate BarraCuda 4TB Internal Hard Drive HDD – 3.5 Inch Sata 6 Gb/s 5400 RPM 256MB Cache For Computer Desktop PC – Frustration Free Packaging ST4000DMZ04/DM004 : Electronics](https://m.media-amazon.com/images/I/818Zr2FoBWL._AC_SL1500_.jpg)