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Oyen Digital U34 Bolt 4TB (USB4 40Gbps) NVMe Thunderbolt 4 (USB-C) Portable SSD, Up to 2800MB/s
Oyen Digital

Oyen Digital U34 Bolt 4TB (USB4 40Gbps) NVMe Thunderbolt 4 (USB-C) Portable SSD, Up to 2800MB/s

Bottom line: The Oyen Digital U34 Bolt 4TB NVMe Thunderbolt 4 Portable SSD ($899.00 on Amazon as of 2026-10-07): Sustained transfers up to 2800MB/s over USB4 40Gbps; main trade-off: ships formatted for macOS; Windows users must reformat first.

$899.00

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Buy on Amazon — $899.00 Compare to similar external storage

By , Founder & Editor-in-Chief · Listing data updated

Mike Perry — Hardware researcher since 2014. For external drives and portable storage, synthesises manufacturer specs and independent reviews rather than first-hand lab testing. Core beat: GPU performance across gaming, rendering, and local-LLM inference.

*Price sourced from Amazon.com. Last updated 2026-10-07. Price and availability subject to change.

Pros & Cons

Pros

  • ✓ Sustained transfers up to 2800MB/s over USB4 40Gbps
  • ✓ ASMedia ASM2464PD controller with USB-IF and Thunderbolt 4 certification
  • ✓ MIL-STD 810 rated enclosure for field and travel use
  • ✓ Aluminum cooling core helps hold temps during sustained workloads

Cons

  • ✗ Ships formatted for macOS; Windows users must reformat first
  • ✗ 2800MB/s needs a USB4 or Thunderbolt port; older USB ports are far slower
  • ✗ 4TB USB4 NVMe costs well above USB 3.2 portable drives
  • ✗ Listing doesn't state NAND type or TBW endurance rating

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SpecPicks Verdict

SpecPicks scored Oyen Digital U34 Bolt 4TB NVMe Thunderbolt 4 Portable SSD using a rating × review-volume × price-fit model applied to published specs and reviews across the external storage category. Oyen Digital's external storage lineup sits within the broader category mid-tier; price and specs are the deciding factors over brand loyalty here. Judge it on the specification table and the price rather than on sentiment: check the figures that decide your use case, then put it side-by-side with two or three close alternatives in the Compare tool before clicking through.

Common buyer scenarios for external storage of this kind: matching it to an existing build, replacing a failing part, or upgrading from a previous-generation equivalent. Check the spec table below against your current setup — particularly socket / form-factor / power-rating fields — and confirm compatibility on the retailer's listing before purchase. Prices and stock are set by the retailer and may have moved since this page was last updated.

Key Features

  • Turbocharged Speeds: Achieve sustained transfer rates up to 2800 MB/s, turning hours of work into minutes.
  • Versatile Connectivity: Compatibility with any USB or Thunderbolt 3/4/5 host ensures seamless collaboration across devices. Formatted for Mac OS.
  • Rugged Endurance: Built tough with MIL-Standard 810 protection rating, it stands resilient in any environment.
  • Cool Under Fire: The cooling aluminum core helps maintain proper internal temperature, even under the most demanding workloads.
  • Peace Of Mind: Backed by a 3-Year OYEN DIGITAL Warranty and USA support staff.
  • Reputable: Driven by the ASMedia ASM2464PD controller, which has USB-IF and Thunderbolt 4 Certification

Full Specifications

BrandOyen Digital
ColorBlack
ReputableDriven by the ASMedia ASM2464PD controller, which has USB-IF and Thunderbolt 4 Certification
Model NameU34 Bolt
Read Speed2800 megabytes_per_second
Unit Count1 Count
Form FactorPortable
Media Speed2800 MB/s
ConnectivityUSB-C
Model NumberU34-4T-BK
CompatibilityMac
Peace Of MindBacked by a 3-Year OYEN DIGITAL Warranty and USA support staff.
Built-In MediaUSB-C 40Gbps cable
Cool Under FireThe cooling aluminum core helps maintain proper internal temperature, even under the most demanding workloads.
Hard-Drive Size4 TB
Mfr Part NumberU34-4T-BK
Number of Items1
Special FeatureBackward Compatible, Portable, Rugged, Shock Resistant, USB 4.0
Rugged EnduranceBuilt tough with MIL-Standard 810 protection rating, it stands resilient in any environment.
Installation TypeExternal Hard Drive

Ready to buy?

Oyen Digital U34 Bolt 4TB (USB4 40Gbps) NVMe Thunderbolt 4 (USB-C) Portable SSD, Up to 2800MB/s is listed on Amazon. Price, availability, shipping and returns are set by Amazon and its sellers — check the listing for current terms. SpecPicks earns a small commission on qualifying purchases — thank you for supporting independent review work.

Buy on Amazon — $899.00

*Price sourced from Amazon.com. Last updated 2026-10-07. Price and availability subject to change.

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Oyen Digital U34 Bolt 4TB (USB4 40Gbps) NVMe Thunderbolt 4 (USB-C) Portable SSD, Up to 2800MB/s
$899.00
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