Seller: topsecretpublishing (320) 100%, Location: Phoenix, AZ, Ships to: Worldwide, Item: 320969620671 Seagate SATA to USB 3.0 Adapterwith USB cable and Power Supply Yes, these came from existing new Seagate GoFlex external hard drives. I just needed the internal hard drive. But the connectors and cables and power supply are used only once. They all work perfectly. You can put in your own SATA 3.5" hard drive, and power it through USB. I have two of these for sale: Seagate GoFlex Desk Adapter USB 3.0 - PN 9ZH9P7-RAA Seagate GoFlex Desk Adapter USB 3.0 - PN 100675058 Free shipping within the continental USA.