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Gray rectangular USB-C and USB-A flash drive, 85 by 20 by 8 mm, 100 g

MemoStone

MemoStone US4-1TB portable SSD 1TB USB 3.1 Gen 2

SKU CH-9023-4VVZS

A 1 TB external SSD with dual USB-A and USB-C connectors delivering up to 510 MB/s read and 480 MB/s write speeds in a compact 85.2 × 20.5 × 8.0 mm metal case

  • Total capacity1 TB
  • Sequential read speedUp to 510 MB/s
  • Sequential write speedUp to 480 MB/s
  • Interface typeUSB 3.1 Gen 2
  • Form factorType C & Type A
  • NAND flash type3D NAND

Capacity US4-1TB

  • 1 TB capacity stores large media libraries
  • Dual USB-C and USB-A connectors work with most devices
  • Sequential read up to 510 MB/s and write up to 480 MB/s speeds transfers
  • 1 000 000 hours MTBF supports long-term reliability
  • Compact 85.2 × 20.5 × 8.0 mm design fits in a pocket

MemoStone US4-1TB portable SSD

The MemoStone US4-1TB is a new external solid-state drive offering 1TB of capacity with 3D NAND memory. It connects via USB 3.1 Gen 2 and includes both Type-C and Type-A connectors for plug-and-play use across devices. Grey aluminium construction keeps weight to 100g.

Upgrade from mechanical drives or USB 2.0 storage

Replacing a spinning hard drive or a USB 2.0 stick with this drive raises sequential reads to 510MBps and writes to 480MBps. The jump is worth it when moving large media libraries, project folders or system images between laptops, desktops and phones that have at least one USB 3.1 Gen 2 port.

Sustained workload behaviour

Under continuous transfer the drive draws 2.15W and is rated for an operating range of -5°C to 60°C with humidity up to 95%. MTBF is specified at 1,000,000 hours, indicating stable performance during extended backups or video offloads without thermal throttling in typical ambient conditions.

How it compares

Measured against everything we stock in Portable USB SSDs, at today’s prices. Recalculated every night.

Price $82.99
Cheaper than about 84% of the 410 comparable items (median $202.99).
Total capacity 1 TB
Typical for this category: the median of 311 items is 1 TB.
Sequential read speed Up to 510 MB/s
Lower than about 88% of the 166 comparable items (median 1,050 MB/s).
Price per TB $82.99 per TB
Cheaper than about 84% of the 310 comparable items (median $142.00 per TB).

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Specifications

Product
Brand nameMemoStone
Product lineUS4
Model nameUS4-1 TB
Part numberUS4-1 TB
Total capacity1 TB
Product colorGray
Performance
Sequential read speedUp to 510 MB/s
Sequential write speedUp to 480 MB/s
Storage
NAND flash type3D NAND
Ports & slots
Interface typeUSB 3.1 Gen 2
Power
Active power draw2.15 W
Size & build
Form factorType C & Type A
Overall width85.2 mm
Product depth20.5 mm
Overall height8.0 mm
Product weight100g
Environment & compliance
Operating temperature range-5 °C to 60 °C
Storage temperature range-20 °C to 75 °C
Operating humidity range5-95%
More details
Mean time between failures1,000,000 h

Other versions of this model

3 more in the same range

Questions about this item

What are the physical dimensions of the MemoStone US4-1TB so I can check if it fits my bag or port spacing?

The drive measures 85.2 mm long, 20.5 mm wide and 8.0 mm thick, weighing 100 g. Its compact 2-in-1 connector combines USB Type-C and Type-A in one housing.

How do I install the MemoStone US4-1TB, and what common mistake should I avoid?

Plug the dual connector directly into a USB 3.1 Gen 2 port; no driver is required. The mistake is using a USB 2.0 port or hub, which caps speed far below the rated 510 MB/s read and 480 MB/s write.

What maintenance or replacement should I expect for the MemoStone US4-1TB over time?

The 3D NAND flash is rated for 1,000,000 hours MTBF. Keep the drive within -5 °C to 60 °C operating temperature and 5–95 % humidity; no user-serviceable parts exist, so replace the unit if it fails.

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