LaCie 2big Dock Thunderbolt 3 User Manual
LaCie 2big Dock Thunderbolt 3 User Manual

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The LaCie 2big Dock Thunderbolt 3 provides high-end performance with USB-C and dual Thunderbolt 3 connection ports, powerful docking features to quickly access and import files from other devices, and a DisplayPort expansion port for video output.


  • Dual Thunderbolt 3 connection portsEach port provides transfer rates up to 40Gb/s bidirectional and 15W of power to a connected device. You can use the Thunderbolt 3 ports to daisy chain up to five additional LaCie 2big Dock devices or other Thunderbolt 3 storage solutions.
  • USB 3.1 connection portProvides universal compatibility with USB-C computers and 27W of power to a connected device.

See Connect your LaCie 2big Dock Thunderbolt 3 for details on connecting your device, and Daisy Chain and Power Delivery for details on daisy chaining multiple storage solutions.


  • SDXC UHS-II and CompactFlash Revision 6.0 Type I card slotsDirectly ingest files from memory cards. Quickly import photos into Adobe® Lightroom® and Premiere Pro®.
  • USB 3.0 hubDelivers 5W of power to connected phones and other devices. Use the hub to transfer files from digital cameras and other drives.

See Docking Features for details on memory card slots and the USB 3.0 hub.


  • DisplayPort 1.2 expansion portConnect to high-resolution up to 5K.

See Expansion Port for details on the DisplayPort 1.2 expansion port.

Thunderbolt 3


Thunderbolt 3 features and support

Thunderbolt 3 technology provides the fastest data and high-end video transfers over a single, versatile connector. While previous generations of Thunderbolt technology offered impressive transfer rates up to 20Gb/s bidirectional, Thunderbolt 3 doubles the potential up to 40Gb/s bidirectional when connected to other Thunderbolt 3 devices. In addition, Thunderbolt 3 gives priority to the video stream, apportioning the required bandwidth for playback. This is a critical advantage when working with high-end video and 3D graphics.

Thunderbolt 3 uses a USB-C connector specially labeled with a Thunderbolt icon. Since Thunderbolt 3 is protocol agnostic, it supports connections from the following interfaces:

  • USB 2.0, USB 3.0 and USB 3.1
  • DisplayPort 1.1 and 1.2a
  • Thunderbolt 20Gb/s and Thunderbolt 40Gb/s
  • Ethernet (with adapter)

Non-Thunderbolt 3 devices that feature USB-C ports can be connected to the Thunderbolt 3 port to terminate a daisy chain.