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MPN: STGB20000400    AVD#: STGB20000400

LaCie 2big Thunderbolt 3

Professional RAID Made Easy.

  • Front-facing USB hub
  • Dual Thunderbolt 3 ports 
  • Innovative design with RAID for reliability
  • USB 3.0 for PC and Mac compatibility
  • RAID 0, 1 and JBOD

The LaCie 2big 2-Bay Thunderbolt 3 RAID Array features 20TB of storage capacity for your Thunderbolt- and USB-equipped systems. It comes with two bays that contain a 10TB 7200 rpm hard drive in each bay. The drives come formatted in HFS+, which provides compatibility with Mac. A reformat of the drives is required for Windows systems. For connectivity, the 2big sports a USB 3.0 port as well as two Thunderbolt 3 ports, so you can daisy chain with other Thunderbolt 3 devices. With a redesigned chassis, it has a wider footprint for stability and a 10% more compact design than the previous generation of 2big.

LaCie has armed this 2big with a hardware controller that provides RAID 1 and 0 modes as well as JBOD.  For data redundancy, the drives come configured in RAID 0, which mirrors the data to both drives. 


With USB 3.0 and Thunderbolt 3 interfaces, the LaCie 2big is able to deliver fast transfer speeds with Thunderbolt 3 devices, while offering compatibility with most systems via USB 3.0. Additionally, USB 3.0 backward compatibility provides connectivity with a standard computer. It comes built with hardware RAID, so you can seamlessly connect to computers without losing the RAID configuration.

RAID for Speed or Security

Hardware RAID delivers sustained performance and better reliability. It is easy to change the RAID mode, but nearly impossible to do so accidentally. You can leave it in RAID 0 (FAST) mode to maximize speed and capacity for working on current projects, and then move completed projects to archival storage quickly.

Additional Features

Power-Saving Mode - save energy by pressing the power button to spin down disks without interrupting daisy chain transfers. Press and hold the button to shut down the product completely
Front-Accessible Disks and Disk Status LEDs - conveniently and quickly remove and replace disks from the front of the product. Keep track of disk health and RAID build status with the front-facing disk status LEDs
Packed with Value for Pros

With a bundled professional backup software suite and compatibility with Time Machine and Windows Backup, the LaCie 2big includes everything you need for secure backup. With email alerts, busy professionals can monitor their storage before potential problems escalate. This product also includes LaCie Private-Public software, which lets you prevent unauthorized access by password-protecting volumes with AES 256-bit encryption.

Capacity 20 TB
Internal Drives 2 x 10 TB (7200 rpm)
Connections 2 x USB Type-C (Thunderbolt 3 (40 Gb/s))
1 x USB Type-C (USB 3.1 Gen 1 (5 Gb/s))
1 x USB Type-A (USB 3.1 Gen 1 (5 Gb/s))
1 x DisplayPort (DisplayPort 1.2)
Interface Transfer Rate Thunderbolt 3: 40 Gb/s
USB 3.0: 5 Gb/s
Power-Saving Modes Yes
RAID Modes Preconfigured in RAID 0
Hardware RAID 0 (fast), 1 (safe), and JBOD
Format HFS+
Alerts System monitoring and email alerts for failure and warning events
Front-facing disk status LEDs
Power 100 to 240 VAC, 50/60 Hz, 60 W
Operating Systems Supported Windows 10 or Later
macOS 10.2 or Later
Dimensions (W x H x D) 8.5 x 4.6 x 3.7" (see spec sheet for accurate dims)
Weight 6.4 lb 
  • LaCie 20TB 2big Dock 2-Bay RAID Array Thunderbolt 3
  • Thunderbolt 3 / USB Type-C Cable
  • USB 3.0 Type-C to Type-A Adapter
  • External Power Supply
  • Limited 5-Year Warranty
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Established in 1985
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