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Welcome to the User Manual for the LaCie 2big Thunderbolt™ 2. LaCie's Thunderbolt 2 storage enclosures feature transfer rates with the potential to reach up to 20Gb/s bi-directional. Connect the LaCie 2big to a computer that supports Thunderbolt 2 technology for the ultimate in performance with 4k video and graphics. The LaCie 2big is ideal for professional editors, photographers, and graphic artists that demand extraordinary performance both in the office and the field.

The LaCie 2big also features a USB 3.0 port. Transfer rates can reach up to 5Gb/s when connected to a computer with a USB 3.0 port. Since it is backwards compatible, USB 3.0 gives you universal connectivity to any computer with a USB 2.0 port.

This manual will guide you through the process of connecting your LaCie 2big enclosure and explain its features. For questions on installation or use, consult the Getting Help page.

Box Content

  • LaCie 2big Thunderbolt 2
  • External power supply
  • USB 3.0 cable (USB 2.0 compatible)
  • Thunderbolt cable
  • Removable access panel
  • RAID selection tool
  • Quick Install Guide

Important info: Save your packaging. In the event that the hard drive should need to be repaired or serviced, it must be returned in its original packaging.


Software suite

Visit LaCie 2big Thunderbolt 2 software to download your free suite of utilities including:

  • Intego® Backup Manager Pro (Mac®)
  • Genie® Backup Manager Pro™ (Windows®)
  • LaCie Desktop Manager (monitor hard drive health and configure email alerts)
  • LaCie Private-Public (protect data with AES 256-bit encryption)

Minimum System Requirements

Your system must meet certain requirements in order for your LaCie product to function properly. For a list of these requirements, please refer to the product packaging or consult the product support web page at


Views of the enclosure

Front view

  1. LED and power button
  2. Hard drive trays



Top view

  1. Hard drive LEDs


Side view

  1. Removable access panel


Side view - open panel

  1. SELECT: RAID selection button
  2. FAST, SAFE, JBOD: LEDs for RAID modes
  3. CONFIRM: RAID confirmation button


Rear view - open panel

  1. USB 3.0 port
  2. Thunderbolt 2 ports
  3. Power supply connection (12V 5A)


Quiet operation and heat management

To reduce noise during operation, the LaCie 2big's fan is located at the back of the device. The advanced thermo-regulated fan guarantees optimal heat management by adjusting its rotational speed for the environment and a wide exhaust chamber allows for enhanced airflow. Additionally, the LaCie 2big's metal casing dissipates heat from the hard drives, keeping them safe and prolonging their life. Since LaCie's unique design draws heat away from the internal hard drives, the external casing will be warm to the touch after extended use.

Important info: Make sure that the exhaust vent on the back bezel is not obstructed and that there is a natural airflow across the casing.


Position and stacking

Always make certain to place the LaCie 2big on a flat, even surface designed to support the heat output and airflow of a professional hard drive enclosure. For proper heat dissipation, the LaCie 2big is designed to stand on its rubber feet, situated on the bottom of the enclosure. DO NOT place the enclosure on its side when it is powered on.

When using multiple enclosures, you can stack one LaCie 2big Thunderbolt 2 enclosure on top of another LaCie 2big Thunderbolt 2 enclosure. However, due to the weight and balance of the LaCie 2big, stacking more than two enclosures poses a severe risk that the devices will fall. DO NOT stack other hard drives, enclosures, or equipment on top of the LaCie 2big.

The warranty for your LaCie 2big Thunderbolt 2 will be voided if you:

  • Stack more than two LaCie 2big Thunderbolt 2 enclosures.
  • Stack other hard drives, enclosures, or equipment on top of the LaCie 2big Thunderbolt 2.
© LaCie 2024 Last modified : Jul 11, 2014