Western Digital

G-Technology 4TB G-DRIVE Mobile USB-C (USB 3.1) Portable External Hard Drive, Space Gray - 0G10347

Status: G-Technology 4TB G-DRIVE Mobile USB-C (4TB hard drive): Unavailable on Amazon as of 2026-10-18 10:25 UTC. Closest in-stock match (same 4TB hard drive): WD 4TB My Passport Ultra, $238.99 on Amazon as of 2026-10-21 20:15 UTC (price may vary). eBay sellers may still list this model new or used.

View Current Price — $238.99 🛒 Search eBay for this model

Bottom line: The G-Technology 4TB G-DRIVE Mobile USB-C Portable External Hard Drive: 4TB capacity in a bus-powered portable enclosure, no separate power brick; main trade-off: spinning platter drive, so far slower than a comparable portable SSD.

Unavailable on Amazon as of 2026-10-18 10:25 UTC

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Currently unavailable on Amazon. Not the same product — 3 in-stock alternatives with matching specs:

Same 4TB hard drive: WD 4TB My Passport Ultra — $238.99 on Amazon as of 2026-10-21 20:15 UTC (price may vary).

View Current Price — $238.99

Same 4TB hard drive: Silicon Power 4TB USB-C USB 3.1 Gen1 Rugged… — $239.97 on Amazon as of 2026-10-21 12:20 UTC (price may vary).

View Current Price — $239.97

Same 4TB hard drive: Western Digital 4TB My Passport Ultra for Mac… — $253.21 on Amazon as of 2026-10-21 12:20 UTC (price may vary).

View Current Price — $253.21

Original listing (currently unavailable) → Compare to similar external storage

By Mike Perry, Founder & Editor-in-Chief · Listing data updated 2026-10-18

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. About the author →

Pros & Cons

Pros

✓ 4TB capacity in a bus-powered portable enclosure, no separate power brick
✓ Up to 140MB/s transfers per WD, fast enough for offloading 4K footage
✓ Machined aluminum shell in Space Gray that matches MacBook Pro styling
✓ Ships with both USB-C and USB-A cables for mixed-vintage machines
✓ Password protection plus encryption for client files and raw footage

Cons

✗ Spinning platter drive, so far slower than a comparable portable SSD
✗ Mac-formatted out of the box; Windows users must reformat before first use
✗ 354.99 USD list puts it above most 4TB portable HDDs on cost per terabyte
✗ Usable capacity is under 4TB since 1TB counts as one trillion bytes

Manufacturer description

The G-Technology G-DRIVE mobile USB-C is a 4TB portable external hard drive built around a machined aluminum enclosure that matches the Space Gray finish of a MacBook Pro. Western Digital rates transfer speeds at up to 140MB/s, which is enough headroom to offload a shoot's worth of photo and video files without leaving your laptop tethered to a desk all afternoon. The drive ships USB-C ready and stays compatible with USB 3.0 and Thunderbolt 3 machines, and both a USB-C and a USB-A cable are in the box, so you are not hunting for an adapter on location. Out of the box it is formatted for Mac…

SpecPicks Verdict

SpecPicks scored G-Technology 4TB G-DRIVE Mobile USB-C Portable External Hard Drive using a rating × review-volume × price-fit model applied to published specs and reviews across the external storage category. Western 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.

Frequently Asked Questions

How fast is the G-DRIVE mobile USB-C?

Western Digital rates it at up to 140MB/s. That is typical for a 2.5-inch spinning drive and plenty for backups and photo or video offloads, though a portable SSD will be several times quicker.

Does it work with a Windows PC or is it Mac only?

It arrives Mac ready with native Time Machine support, but it is easily reformatted for Windows. Reformatting erases the drive, so do it before you copy anything over.

Do I need a Thunderbolt 3 port to use it?

No. The drive is USB-C ready and compatible with USB 3.0 and Thunderbolt 3 ports. Both a USB-C cable and a USB-A cable are included, so older laptops work without an adapter.

Is it an SSD or a hard drive?

It is a mechanical hard drive in an aluminum enclosure, which is how it reaches 4TB at this size and price. Expect the 140MB/s rating rather than SSD-class speeds.

Can I lock the drive so other people cannot read my files?

Yes. The G-DRIVE mobile USB-C supports password protection and encryption, so you can secure client work or personal archives. Check the product listing for current warranty terms.

Key Features

Stylish, aluminum design
With capacities up to 4TB of portable storage (as used for storage capacity, one terabyte (TB) = one trillion bytes. Total accessible capacity varies depending on operating environment.)
USB C ready; USB 3.0 and Thunderbolt 3 compatible
Mac ready; easily reformatted for Windows

Full Specifications

Brand	Western Digital
Color	Space Gray
Model Name	G-DRIVE Mobile
Read Speed	140 megabytes_per_second
Form Factor	2.5-inch
Media Speed	up to 140 MB/s
Connectivity	USB-C
Model Number	0G10347
Compatibility	Mac
Built-In Media	G-DRIVE mobile, Quick Start Guide, USB-C to USB-A cable, USB-C to USB-C cable
Item Type Name	G-Technology 4TB G-DRIVE Mobile USB-C (USB 3.1 Gen 1) Portable External Hard Drive, Space Gray - 0G10347
Hard-Drive Size	4 TB
Mfr Part Number	0G10347
Number of Items	1
Special Feature	Portable
Hardware Platform	PC; Mac
Installation Type	External Hard Drive
Compatible Devices	Desktop, Laptop, Television
Data Transfer Rate	135 megabytes_per_second
Enclosure Material	Aluminum

Ready to buy?

Amazon shows no buyable offer for G-Technology 4TB G-DRIVE Mobile USB-C at the last check. The closest in-stock match with the same 4TB hard drive is WD 4TB My Passport Ultra. SpecPicks earns a small commission on qualifying purchases — thank you for supporting independent review work.

View Current Price — $238.99