LaCie 2big Dock  User Manual
LaCie 2big Dock  User Manual

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Daisy Chain and Power Delivery

Use the two Thunderbolt 3 ports on the LaCie 2big Dock for:

  • Direct connection to a computer that is compatible with Thunderbolt 3 and Thunderbolt 4 technology.
  • Daisy chaining with devices and displays that are compatible with Thunderbolt technology.

How to daisy chain

The peripheral Thunderbolt 3 port on 2big Dock can be used to daisy chain compatible Thunderbolt peripherals, such as hard drives and monitors. If you have another Thunderbolt storage device, make certain to connect it to the daisy chain before adding compatible displays or USB devices.

USB devices can terminate a Thunderbolt daisy chain and should always be the last device. It must be connected to the secondary Thunderbolt port on the preceding device. (The USB device will not be recognized if connected to the preceding device’s USB-C port.)

  Important cable info: When connecting 2big Dock's peripheral/daisy chain Thunderbolt 3 port to a compatible device, use cables specifically constructed to support Thunderbolt 3.

Power delivery

2big Dock delivers power to your connected laptop and compatible peripheral devices.

No device connected to peripheral port
Host port Peripheral port
45W N/A


Device connected to peripheral port
Host port Peripheral port
30W 15W
 2big Dock must receive power via its power cable in order to deliver power to compatible devices.
 LaCie is not responsible for devices that experience harm, damage, or malfunction when connected to LaCie 2big Dock.