LaCie 1big Dock SSD Pro User Manual
LaCie 1big Dock SSD Pro User Manual

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System Overview


Front view

  1. Status LED—Indicates that the device is powered on. See Operation.
  2. USB 3.2 Gen 2 hub—Connect shuttle drives, digital cameras, and other devices to transfer files. Charge devices like mobile phones (7.5W power output). See Docking Features.
  3. CFast 2.0 slot—Read CFast 2.0 memory cards. See Docking Features.
  4. Secure Digital (SDXC) slot—Read SD memory cards. See Docking Features.
  5. CFexpress slot—Read CFexpress memory cards. See Docking Features.

Rear panel view

  1. Power input—Connect the power cable. Only use the power cable included with your LaCie 1big Dock SSD Pro. Attaching third-party or other LaCie power cables with incorrect voltage can damage the device. See Operation.
  2. Host port—Thunderbolt 3 port that connects to a Thunderbolt 3 port on the host computer. Use the provided Thunderbolt 3 cable. See Getting Started.
  3. Peripheral port—Thunderbolt 3 port that connects compatible peripheral devices and displays. Use this port to connect a single Thunderbolt 3/USB-C device or to daisy-chain multiple Thunderbolt devices. You can also use this port to connect your laptop's USB-C power supply to the peripheral port and deliver up to 80W to the laptop connected to the host port. See Daisy Chain, Power Delivery & Power Pass-Through.
  4. DisplayPort—Send the video signal from your computer to a monitor. See Expansion Port.
  5. Manual shutdown button—Press and hold this button for more than 4 seconds to cut power and shut down 1big Dock SSD Pro. This button allows you to conserve power without having to unplug 1big Dock SSD Pro. See Operation.
  6. Kensington™ lock port—Use this port to physically lock 1big Dock SSD Pro to a desk or rack.
  7. Firmware update button—Updates to the USB firmware are posted on the support page to enhance your product. Only press this button when following instructions to update the USB firmware. Use a thin rigid wire (such as the end of a paperclip) to push the button within the enclosed space.



Side Dimensions (in/mm)
Length 4.646in/118mm
Width 2.217in/56.3mm
Depth 8.543in/217mm


Model Weight (lb/kg)
1big Dock SSD Pro 2.866lb/1.3kg


Power adapter 20V@5.5A

 Use only the power supply provided with your device. Power supplies from other LaCie, Seagate, and third-party devices can damage your 1big Dock.

Temperature ranges

Ambient environment Temperature range
Standard (operating) 5 to 35 °C