The Glyph Atom EX20 4TB is a rugged, bus-powered portable NVMe SSD built for demanding video, photography, audio and on-location workflows. Its USB 3.2 Gen 2×2 Type-C interface supports transfer speeds up to 2,100MB/s on a compatible 20Gbps host, while Glyph’s aluminium thermal design is engineered to maintain dependable performance during sustained creative workloads.
The compact enclosure combines a solid aluminium core and outer shell with a soft composite bumper and MIL-Standard 810F resistance to shock, vibration and dust. Real-time integrated health monitoring, fanless cooling and Glyph’s 3-2-1 warranty add practical reassurance for professional use.
£ 643.95 | £ 772.74 inc VAT
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The Glyph Atom EX20 4TB is the 20Gbps member of Glyph's high-intensity Atom EX portable SSD range, combining NVMe storage, rugged construction and a thermally efficient aluminium enclosure in a compact bus-powered design.
It is aimed at creators who need fast media ingest, portable project storage and direct-from-drive workflows without moving to the higher-bandwidth USB4 interfaces used by the EX40 and EX80.
The EX20 uses a USB 3.2 Gen 2x2 Type-C interface with up to 20Gbps link bandwidth. Glyph specifies transfer speeds up to 2,100MB/s when connected to a compatible USB 3.2 Gen 2x2 port, making it well suited to 4K editing, high-resolution photo libraries, media delivery and rapid card-offload workflows.
The drive is backward compatible with USB 3.1, USB 3.0 and Thunderbolt 3/4/5 hosts, but the connection does not always operate at 20Gbps. Glyph's current compatibility table specifies up to 1,050MB/s on Apple Silicon Macs using Thunderbolt 3/4 or Thunderbolt 5, on USB4 40Gbps PCs, on Intel Mac/PC Thunderbolt 3 ports, and on ordinary 10Gbps USB-C hosts. The full 2,100MB/s figure therefore requires a host that supports USB 3.2 Gen 2x2.
A solid aluminium core and outer shell conduct heat away from the SSD, increasing the thermal ceiling without a fan. The passive design is intended to provide more consistent performance during long transfers and sustained production workloads while keeping operation quiet.
The aluminium exo-skeleton is paired with a soft composite bumper and is rated to MIL-Standard 810F for shock, vibration and dust resistance. That makes the EX20 practical for mobile production, travel and location work where storage is regularly transported between systems.
Glyph includes real-time integrated health monitoring as part of the EX20 design, providing additional visibility into drive condition for users relying on the SSD for active project storage and production work.
The EX20 draws its operating power from the host connection, so no external power supply is required. Its compact 2.2 x 4.0 x 0.6-inch drive dimensions and short 15cm USB Type-C to Type-C cable make it easy to integrate with laptops and portable workstations.
The drive is supplied formatted for macOS and can be reformatted for Windows. Actual transfer performance depends on the host interface, operating system, workload and other system factors.
Glyph backs the Atom EX20 with its 3-2-1 warranty: three years of full hardware coverage, two years of Level-1 data recovery and one year of advance replacement. Glyph also states that the Atom EX range is designed, tested and assembled in the USA.
| Manufacturer | Glyph Production Technologies |
| Product | Atom EX20 High-Intensity NVMe SSD |
| Manufacturer Part Number | A20EX4000 |
| UPC | 691450005716 |
| Capacity | 4TB |
| Storage Technology | NVMe SSD |
| Interface | USB 3.2 Gen 2x2 Type-C (20Gbps) |
| Maximum Transfer Speed | Up to 2,100MB/s on a compatible USB 3.2 Gen 2x2 host |
| Apple Silicon Mac With Thunderbolt 3/4 | Up to 1,050MB/s (USB 10Gbps mode) |
| Apple Silicon Mac With Thunderbolt 5 | Up to 1,050MB/s (USB 10Gbps mode) |
| USB4 40Gbps PC | Up to 1,050MB/s (USB 10Gbps mode) |
| Intel Mac / PC With Thunderbolt 3 | Up to 1,050MB/s (USB 10Gbps mode) |
| USB-C 10Gbps Host | Up to 1,050MB/s |
| Backward Compatibility | USB 3.1, USB 3.0 and Thunderbolt 3/4/5 hosts, subject to host interface limits |
| Power | Bus-powered |
| Cooling | Fanless passive heat dissipation |
| Construction | Solid aluminium core and outer shell; aluminium exo-skeleton with soft composite bumper |
| Rugged Rating | MIL-Standard 810F for shock, vibration and dust resistance |
| Health Monitoring | Real-time integrated health monitoring |
| Compatibility | Formatted for macOS; Windows compatible after reformatting |
| Drive Dimensions | 2.2 x 4.0 x 0.6in |
| Retail Box Dimensions | 4.1 x 6.2 x 1.65in |
| In The Box | Glyph Atom EX20 External SSD, USB Type-C to Type-C 15cm cable, rugged removable external cover |
| Warranty | 3-year full hardware; 2-year Level-1 data recovery; 1-year advance replacement |
| Assembly | Designed, tested and assembled in the USA |
Generally, next working day delivery services (UK Mainland) are available on standard Glyph Technology Delivery orders placed before 2 pm (subject to stock availability).
Non-timed deliveries should be delivered between 9 am and 6 pm.
Orders placed after 2 pm on Fridays and weekends will be processed as normal the following Monday.
Orders placed on Bank Holidays will be processed the next working day.
If urgent, please call one of our helpful account managers so they may double check everything for you, enabling you to place your order with confidence.
Please note: these product details are for guide purposes only, and may contain errors.
We always recommend double-checking the product specs and features on the manufacturer website, or contact us if unsure before ordering.
