Do you always have to have the power adapter plugged in? In other words can it work without the power adapter, in the case of an SSD drive?

It does not need to have the power adapter connected when either using 2.5" SATA hard drive or any SSD. The power adapter is only for the 3.5" SATA hard drive.

WD Red Plus 10TB NAS Hard Disk Drive - 7200 RPM Class SATA 6Gb/s, CMR, 512MB Cache, 3.5 Inch - WD100EFGX

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Main image of StarTech USB31C2SAT3 USB C to SATA Adapter Cable - for 2.5 / 3.5” SATA Drives - 10Gbps - USB 3.1 - SATA to USB Adapter - External Hard Drive Cable

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StarTech USB31C2SAT3 USB C to SATA Adapter Cable - for 2.5 / 3.5” SATA Drives - 10Gbps - USB 3.1 - SATA to USB Adapter - External Hard Drive Cable

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Connect a 2.5"/3.5" SATA SSD/HDD to your USB-C enabled computer with this USB 3.1 adapter cable
Transfer and backup data from a SATA drive to your USB Type C laptop or PC with the fast speed of USB 3.1 (10Gbps)
Thunderbolt 3 port compatible
Supports SATA I/ II/ III
Includes power adapter
Tool-free cable-style adapter for quick access to external data
SATA drive adapter with integrated 1m cable
UASP support
USB C to SATA Adapter Cable / SATA USB adapter / SATA to USB adapter

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USB C to SATA Adapter Cable for 2.5"/3.5" SSD/HDD Drives - USB 3.1 (10Gbps) Hard Drive Adapter Cable - SATA USB adapter - Hard Drive Adapter Cable

Model
Brand	StarTech.com
Model	USB31C2SAT3
Type	SATA
Type	Others
Color	Black

Details
Length	3.3 ft.
Cable Length	3.3 ft.
Connector Number	2
Connector Detail	1 - SATA Data & Power Combo (7+15 pin) 1 - USB Type-C (24 pin) USB 3.1 (10Gbps) Male
Speed	USB 3.1 Gen 2 - 10 Gbit/s SATA III (6 Gbps)

Features
Features	Connect a 2.5"/3.5" SATA drive to your USB-C enabled laptop or desktop computer, for quick access to your external data Fast data transfer rates through USB 3.1 Gen 2 (10Gbps) Integrated 1 m cable, for convenient use Supports SATA I, II, III (up to 6Gbps) Thunderbolt 3 USB-C port compatible Tool-free design, for easy drive installation TRIM support 4Kn support Supports drive S.M.A.R.T. data pass through for drive monitoring UASP support Hot-swap and plug-and-play support Power/Activity LED indicator Backward compatible with USB 3.0 and USB 2.0 computers

Group
Cable Length	0.5 ft.

Additional Information
First Listed on Newegg	January 19, 2026

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StarTech USB31C2SAT3 USB C to SATA Adapter Cable - for 2.5 / 3.5” SATA Drives - 10Gbps - USB 3.1 - SATA to USB Adapter - External Hard Drive Cable

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Item#: 9SIBSWCKS03338

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StarTech USB31C2SAT3 USB C to SATA Adapter Cable - for 2.5 / 3.5” SATA Drives - 10Gbps - USB 3.1 - SATA to USB Adapter - External Hard Drive Cable

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Customer Reviews of the STARTECH USB31C2SAT3

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