LaCie 2big Dock Thunderbolt 4 RAID Hard Drive 48TB
- 48TB, 2 drive bays
- Dual Thunderbolt 4 ports, daisy-chain up to five devices
- Thunderbolt 4, Thunderbolt 3, USB4, USB 3.2, USB 3.0 compatible
- Up to 550MB/s
- Hot-swappable IronWolf Pro 7200 rpm drives
- Rescue Data Recovery Services
- 5 year manufacturer warranty
- 3.81 kg
Last refreshed Sep 23, 2026 · Based on the Amazon listing and published specifications, not hands-on testing.
A Thunderbolt desktop RAID that also acts as a dock, chaining other devices for a clean creative workstation. It is heavy and built for a fixed desk.
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ASIN: B0CNXXNSQ7Model: 2big DockCategory: External Hard Drives
Overview
Plugging one Thunderbolt cable into a Mac, PC or USB-C iPad brings this LaCie RAID online as a storage hub. Two Thunderbolt ports let you chain further devices, and the hot-swap drive bays allow a failed drive to be replaced without shutting down.
Thunderbolt daisy-chaining turns the storage into a desk hub for monitors and other drives. Spinning hard drives cap speed below SSD levels, and its weight anchors it to the desk.
Who it's for
Editors and photographers with Thunderbolt machines get huge capacity and chaining in one box. Travelers should choose a portable SSD.
Pros and cons
- Thunderbolt 4 daisy-chaining
- Broad USB4 and USB compatibility
- Data recovery service
- Heavy desktop unit
- Hard drives slower than SSD
- Cables in box not listed
Performance notes
Drive speed, not the Thunderbolt link, limits throughput, since the bus is far faster than two spinning disks. Daisy-chaining shares bandwidth across connected devices. Enterprise drives sustain long video transfers without throttling.
Specifications
| Brand | LaCie |
|---|---|
| Model | 2big Dock |
| Dimensions & fit | |
| Item weight | 3.81 kg |
| Capacity & performance | |
| Digital Storage Capacity | 48 TBhigher than 99% of 144 external hard drives |
| Read Speed | Up to 550MB/s |
| Hard Disk Rotational Speed | 7200 rpmhigher than 64% of 57 external hard drives |
| Compatibility & installation | |
| Compatibility | Thunderbolt 4, Thunderbolt 3, USB4, USB 3.2, USB 3.0 |
| Warranty & support | |
| Warranty Description | 5 year manufacturer, Rescue Data Recovery Services |
| Other details | |
| Data Transfer Rate | 40 gigabits per second |
| Drive bays | 2 |
| Daisy chain | Up to five devices |
| Ports | Dual Thunderbolt 4 |
| Drives | IronWolf Pro, hot-swappable |
Closest rivals on specs
WD My Book Duo Desktop RAID External Hard Drive 28TB- Digital Storage Capacity 48 vs 28 TB (+71%)
- Hard Disk Rotational Speed 7200 vs 5400 rpm (+33%)
Seagate Expansion Desktop STKP26000400 Hard Drive 26TB- Digital Storage Capacity 48 vs 26 TB (+85%)
SanDisk Professional G-Drive Enterprise Desktop Hard Drive 26TB- Digital Storage Capacity 48 vs 26 TB (+85%)
Frequently asked questions
Does the LaCie 2big Dock work with an iPad?
Yes. LaCie lists PC, iPad USB-C and Mac compatibility.
How many devices can I chain to the LaCie 2big Dock?
The dual Thunderbolt ports can daisy chain up to five Thunderbolt devices.
Can I replace a drive in the LaCie 2big Dock?
Yes. It uses hot-swappable IronWolf Pro enterprise-class drives in 2 drive bays.
Does the LaCie 2big Dock work with USB computers?
Yes. It is compatible with USB4, USB 3.2 and USB 3.0 as well as Thunderbolt.