Our take
Consider the LaCie Rugged RAID STFA4000400 when a field workflow needs a two-drive enclosure and can use either a 4TB RAID 0 volume or a roughly 2TB RAID 1 mirror. Its documented Thunderbolt and USB 3.0 paths make the connection choice part of the purchase: Thunderbolt can supply bus power, while USB use calls for an external power supply. The saved sources do not specify Thunderbolt generation 2, current operating-system support, or the contents and condition of a present used offer. This is a specialized array rather than a simple pocket backup disk.
A field workflow that needs a large two-drive array and can accept an outlet for USB use, or has a confirmed compatible Thunderbolt host and cable.
Buyers who need 4TB in RAID 1, a generic no-adapter USB setup, confirmed Thunderbolt 2, current OS compatibility, a current exact Amazon listing, or a verified condition and accessory bundle.
Pros & cons
What could work for you, and what to consider before buying.
What works in its favor
- The official datasheet maps STFA4000400 to the orange 4TB configuration, while the saved exact-code crosswalk describes two internal 2TB hard drives.
- The official guide documents hardware RAID 0 and RAID 1, so buyers can choose between the full nominal capacity and mirroring at about half that capacity.
- The guide documents bus power over Thunderbolt, and the datasheet lists a USB 3.0 cable that is compatible with USB 2.0.
What to weigh up
- The 4TB figure applies to RAID 0; RAID 1 mirrors the two 2TB members and leaves about 2TB nominal.
- USB operation requires the separate power supply, and the sources do not identify the Thunderbolt generation, so this model cannot meet a strict Thunderbolt 2 requirement.
- The published host and operating-system requirements are old; current compatibility, exact Amazon mapping, current package contents, RAID setting, and individual-unit condition remain unknown.
The key details
| Model covered | STFA4000400 |
|---|---|
| Advertised capacity | 4TB nominal in RAID 0; about 2TB nominal in RAID 1 |
| Drive configuration | Two internal HDDs with hardware RAID 0/1 |
| Host connection | Thunderbolt and USB 3.0; USB cable is USB 2.0 compatible; Thunderbolt generation unspecified |
Performance figures are manufacturer claims. Source checked October 9, 2026. Regional models and included accessories can differ.
What the features mean for you
Is this a field array or a basic backup drive?
The STFA4000400 is a two-drive LaCie Rugged RAID configuration intended for carrying a larger field-storage set. Its orange 4TB mapping is documented in the official datasheet, and the saved exact-code crosswalk describes two internal 2TB disks. That construction gives it a different role from the reviewed 1TB LaCie 9000477, which is an SSD workstation array, and from the single-drive portable models in this comparison. The Rugged RAID may suit a photo or video workflow that needs a large volume between locations, but it adds a RAID setting and a more involved power choice. Neither RAID mode is an independent backup: keep a separate copy of important files.
How much capacity does each RAID layout leave?
The official product guide documents hardware RAID 0 and RAID 1. In RAID 0, the two drives are combined for the 4TB nominal capacity listed for this model. Striping can make one larger working volume, but both members participate, so a drive failure can put the array's contents at risk. In RAID 1, the saved exact-code crosswalk identifies two 2TB members that mirror the same data, leaving about 2TB nominal rather than 4TB. A mirror can preserve access if one member fails, but it does not protect against theft, enclosure failure, accidental deletion, or a mistake copied to both drives. Decide which layout is active and how much space it provides before relying on an old unit.
How do USB and Thunderbolt change the power setup?
The product guide lists Thunderbolt and USB 3.0 and says the enclosure can draw bus power over Thunderbolt. The datasheet lists a separate supply for USB operation and describes a USB cable compatible with USB 2.0. This means the USB 2.0 and USB 3.0 paths are documented, but neither should be treated as a no-outlet USB setup. The Thunderbolt source does not identify generation 2, so a port's shape or the word Thunderbolt alone cannot establish that it meets a Thunderbolt 2 requirement. Confirm the host, cable, power route, and present operating-system compatibility for the exact unit.
What does the published transfer figure establish?
LaCie's datasheet gives an up-to-240 MB/s figure and scopes its cited AJA System Test result to a Mac connected over Thunderbolt. That is a manufacturer-reported test condition, not a measurement from this review and not a promise for USB, another host, every file workload, or a drive that has been used for years. Interface, active RAID layout, host, workload, and physical condition all affect the result. Treat the figure as evidence of the model's original positioning, not as a reason to expect that rate from a particular second-hand unit.
How should you read the enclosure protection claims?
The saved exact-code page repeats vendor claims for a 1.5-meter drop test while the drive is not operating and an IP54 rating with the protective cap installed. Those conditions matter: they do not describe a running drive being dropped, immersion, or a unit tested after years of wear. IP54 is not a promise that the enclosure can be submerged. The field-oriented shell may be useful for transport, but inspect the case, cap, connectors, and disks on the individual unit and keep another backup. A model-level claim cannot establish the condition of a particular seller's item.
What should you confirm about an old package or listing?
The 2016 datasheet lists an integrated Thunderbolt cable, a USB cable, a removable cover and spare, and a power supply for USB use as original-box contents. That list describes the historical package, not a current used or open-box offer. The frozen source title also mentions an Ivation case; that is a separate historical bundle item, not part of the LaCie model identity. The historical Amazon ASIN has not been verified as a current exact offer, so use the tagged STFA4000400 model search and ask the seller to confirm the model code, working disks, active RAID setting, power supply, cables, cap, and return terms.
Who should consider this configuration?
Shortlist it for a field workflow that benefits from a two-drive array and can choose between a 4TB RAID 0 workspace and a roughly 2TB RAID 1 mirror. USB users should plan for an outlet and confirm the external supply; Thunderbolt users should verify the actual host generation and cable rather than assuming Thunderbolt 2. Choose a simpler portable model if you need USB bus power, and choose a model with current documentation if present-day OS support is essential. The exact model search, old package list, and vendor protection claims do not establish a current offer, current accessories, or a healthy individual drive.
What else to compare
Before you buy
Does RAID 1 give this model 4TB of mirrored space?
No. The 4TB nominal capacity is the RAID 0 configuration. The saved two-by-2TB crosswalk gives about 2TB nominal in RAID 1.
Can I run it from USB without an outlet?
The sources say it is bus-powered over Thunderbolt, while USB operation requires the separate supply. Confirm the exact host path and that a present offer includes a working adapter.
Is the Thunderbolt connection confirmed as Thunderbolt 2?
No. The inspected sources say Thunderbolt without specifying generation, so it does not meet a strict Thunderbolt 2 filter.
Does the old Amazon ASIN identify a current STFA4000400 offer?
That mapping is unverified. Use the tagged exact-model search and check the model code and condition on the seller's actual listing.
Where can I check the current price?
Use the Amazon link for current offers. Check the exact model, seller, product condition, delivery, and return terms. This page does not display a live price or confirm stock.
Sources & review basis
We use the following manufacturer documentation for the product features above. Our suitability notes and buying advice are editorial judgments based on those features, not measured performance results.
- LaCie Rugged RAID official datasheet DS1870.1-1602US, mapping STFA4000400 to orange 4TB ↗ — checked October 9, 2026.
- Official 2016 LaCie Rugged RAID datasheet: page 1 describes the field-storage role and 4TB RAID 0 capacity; page 2 maps STFA4000400 to orange 4TB and lists interfaces, dated host requirements, and original package contents. ↗ — checked October 9, 2026.
- Official 2015 LaCie product guide: page 4 maps 9000601 to Rugged RAID 4TB and documents Thunderbolt, USB 3.0, hardware RAID 0/1, and Thunderbolt bus power. ↗ — checked October 9, 2026.
- Saved exact-code Newegg listing for LAC9000601: describes two internal 2TB drives, RAID 0/1 behavior, the bounded non-operating drop and capped IP54 claims, and the Mac/Thunderbolt test condition. The saved identity crosswalk connects this code to STFA4000400; this old page is not current offer evidence. ↗ — checked October 9, 2026.
The decision
Consider the LaCie Rugged RAID STFA4000400 when a field workflow needs a two-drive enclosure and can use either a 4TB RAID 0 volume or a roughly 2TB RAID 1 mirror. Its documented Thunderbolt and USB 3.0 paths make the connection choice part of the purchase: Thunderbolt can supply bus power, while USB use calls for an external power supply. The saved sources do not specify Thunderbolt generation 2, current operating-system support, or the contents and condition of a present used offer. This is a specialized array rather than a simple pocket backup disk.
Is it the right fit?
Check the exact model and today’s offers on Amazon.