OSCOO M.2 2242 NVMe PCIe Gen4*4 SSD on a white background

OSCOO ON1000B PCIe Gen4 x4 NVMe M.2 2242 SSD on a computer motherboard

OSCOO ON1000B SSD with performance specifications on a black background

High-performance 3D TLC NAND memory chip on a dark surface with tools and components.

Group of people wearing headsets with text about 24/7 customer support and a three-year warranty.

ON1000B M.2 2242 NVMe PCIe Gen4.0 SSD

$119.99 USD

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Unleash Gen4 power in compact form.

Up to 5400MB/s Read, 4900MB/s Write
NVMe PCIe Gen4.0×4
M.2 2242 Compact Form Factor
Graphene Heat Spreader

Capacity

512GB
1TB
2TB
4TB

Capacity

Quantity

Free Shipping on orders $109+

5-10 Business Days
30-Day Return Policy
Secure Payment
3-Year Warranty

Unleash Gen4 power in compact form

OSCOO's ON1000B M.2 2242 NVMe SSD delivers next-generation PCIe Gen4.0 performance in an ultra-compact form factor. With cutting-edge NVMe technology, it offers exceptional sequential speeds up to 5400MB/s and capacities up to 4TB to handle demanding workloads, 4K content creation and professional applications. The ON1000B features advanced 3D Nand Flash with graphene heat spreading technology, enabling power users and creative professionals to achieve uncompromising performance in space-constrained builds.

Full specifications & FAQ

OSCOO ON1000B M.2 2242 NVMe Gen4 SSD — 5,400MB/s, Single-Sided, Up to 4TB

The ON1000B is the flagship of OSCOO's 2242 lineup: PCIe Gen4×4 speeds up to 5,400 MB/s in a single-sided, 2 mm design — with a 4TB option no other drive in this size class of ours reaches. For the Lenovo Legion Go and other devices with Gen4-capable 42mm slots, this is the no-compromise pick: full Gen4 bandwidth, handheld-friendly thickness, and room for an entire game library.

Key specifications:

Form factor: M.2 2242 (42 × 22 × 2 mm), single-sided — meets handheld clearance requirements, 6.1 g
Interface: NVMe PCIe Gen4×4 (backward compatible with Gen3)
Read speed up to 5,400 MB/s, write speed up to 4,900 MB/s
4K random performance: up to 2,900K read / 2,600K write IOPS on the 4TB model (2,200K/2,100K on 512GB; 2,500K/2,300K on 1TB–2TB)
Capacities: 512GB / 1TB / 2TB / 4TB
3D NAND flash
Endurance: 325 / 650 / 1,300 / 2,600 TBW by capacity; TRIM, NCQ, and S.M.A.R.T. supported
Operating temperature 0–70°C, storage temperature −40–85°C
Compatible with Windows 10/11, macOS, and Linux
3-year warranty

Who it's for: Lenovo Legion Go owners using the console's full Gen4 bandwidth; GPD and other Gen4 handhelds; compact laptops and mini PCs with Gen4 2242 slots; anyone who wants 4TB in a 42mm drive.

Which 2242 drive do I need? Four options, one decision tree. Device specifies SATA → ON800. NVMe on a budget, standard clearance → ON900B (double-sided, 2,100 MB/s). Thin device with a Gen3 slot → ON900B PRO (single-sided, 3,500 MB/s). Gen4 slot — including the Legion Go — or you want maximum speed and capacity → the ON1000B, this drive.

FAQ:

Is this the best OSCOO drive for the Legion Go? Yes — the Legion Go's 2242 slot supports PCIe Gen4, and the ON1000B is our only Gen4 drive in this size. Single-sided as the Legion Go requires, and the 4TB option holds a full library.
What happens in a Gen3 slot? It works perfectly at Gen3 speeds (~3,500 MB/s). If your device is Gen3-only, the ON900B PRO delivers the same real-world result for less.
Can I use it in a 2280 slot? Yes, with a 42mm standoff position — common on motherboards and many laptops.

All OSCOO products come with a 3-year warranty.

Specifications

Model

ON1000B

Product Dimensions

42 × 22 × 2mm (1.7" × 0.9" × 0.08")

Form Factor

M.2 2242

Interface Protocol

NVMe PCIe Gen4.0×4

Sequential Speed

Up to 5400MB/s read, Up to 4900MB/s write

Function Support

TRIM, NCQ and S.M.A.R.T

Support System

Windows, Mac OS, and Linux.

Operation Temperature

0~70°C

Storage Temperature

-40°C to 85°C

Color

Blue

Product net weight

6.09g

Capacities

512GB, 1TB, 2TB, 4TB

Flash

3D Nand Flash

IOPS 4k Random Speed

512GB - 2200K / 2100K

1TB - 2500K / 2300K

2TB - 2900K / 2600K

Warranty

3 years

Endurance

512GB - 325TBW

1TB - 650TBW

2TB - 1300TBW

4TB - 2600TBW

Datasheet

Download Datasheet

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Frequently Asked Questions

This resource is crafted to help you find information easily and efficiently.

Can the ON1000B be installed in my laptop/mini PC?

The ON1000B uses the compact M.2 2242 form factor (42mm length), making it ideal for space-constrained devices like ultrabooks, mini PCs, and embedded systems. It's compatible with any device that has an M.2 slot supporting PCIe Gen4.0×4 interface. The short 2242 form factor fits where standard 2280 SSDs cannot, perfect for Intel NUCs, Steam Deck, and industrial computers.

Will gaming performance be affected compared to larger SSDs?

Despite its compact size, the ON1000B delivers flagship-level performance with up to 5400MB/s read speeds - faster than most full-size SSDs. Game loading times will be virtually instant, with DirectStorage API support for next-gen gaming. The Gen4×4 interface provides ample bandwidth for even the most demanding games and applications.

Will it overheat in compact devices with limited airflow?

The ON1000B is specifically engineered for embedded and industrial environments with operating temperatures from 0°C to 70°C. Its compact 2242 form factor generates less heat than larger SSDs, while 3D NAND Flash technology provides excellent thermal efficiency. Even in fanless mini PCs, it maintains stable performance without throttling.

Can I run professional software directly from the ON1000B?

Absolutely. With up to 4900MB/s write speeds, the ON1000B handles demanding workloads like CAD, video editing, and database applications smoothly. The NVMe interface with TRIM, NCQ and S.M.A.R.T support ensures professional-grade reliability for mission-critical applications in industrial and embedded environments.

What is the actual usable capacity of the ON1000B?

256GB version: approximately 238GB usable

512GB version: approximately 476GB usable

1TB version: approximately 931GB usable

2TB version: approximately 1.86TB usable

4TB version: approximately 3.72TB usable

(System formatting and binary conversion consume some space, which is industry standard)

How reliable is it for industrial/embedded applications?

The ON1000B is designed for industrial-grade reliability with extended temperature ranges (-40°C to 85°C storage). The 3D NAND Flash provides excellent durability and data retention. With TRIM, NCQ and S.M.A.R.T monitoring, it ensures long-term stability in embedded systems, medical devices, and automation equipment.