LaCie 1big Dock User Manual
LaCie 1big Dock User Manual

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System Overview


Front view

  1. Status LED—The LED indicates that the device is powered on and provides status signals. See Operation.
  2. USB 3.2 Gen 2 Hub—Use the hub to charge devices like mobile phones (7.5W power output). Connect shuttle drives, digital cameras, and other devices to transfer files. See Docking Features.
  3. CompactFlash (CF) Slot—Use this slot to read CF memory cards. See Docking Features.
  4. Secure Digital (SDXC) Slot—Use this slot to read SD memory cards. See Docking Features.
  5. Swappable hard drive tray—Hard drive tray can be removed to replace a failed hard drive. See Hard Drive Maintenance.

Rear panel view

  1. Power input—Use this port to connect the power cable. Only use the power cable included with your LaCie 1big Dock. 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 or USB 3.1 port on the host computer. Use the provided Thunderbolt 3 cable. See Connect your LaCie 1big Dock.
  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—Use this port to send the video signal from your computer to a monitor. See Expansion Port.
  5. Sleep button—Use this button to sleep/wake the device. See Operation.
  6. Kensington™ lock port—Use this port to physically lock 1big Dock 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 with drive 3.748lb/1.7kg


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