- Up to 4,000 MB/s sequential read and 3,800 MB/s sequential write speeds over 40 Gbps USB4
- Sustained steady-state write performance maintaining up to 2,000 MB/s during large data transfers
- Ultra-slim 0.33 in (8.3 mm) profile and lightweight 3.39 oz (96 g) drop-resistant chassis
- Hardware-based AES 256-bit encryption with password protection via Samsung Magician
- Requires a host system with a dedicated 40 Gbps USB4 port to achieve maximum rated speeds
- Lacks native Thunderbolt support, defaulting to lower bus speeds on non-USB4 host ports
Overview
Operating over a 40 Gbps USB4 Gen 3×2 interface, the Samsung Portable SSD P9 targets high-bandwidth sequential data transfers, achieving peak read speeds of 4,000 MB/s and write speeds of 3,800 MB/s. Sustained write operations maintain up to 2,000 MB/s, allowing prolonged heavy data transfers without the steep post-cache write collapse common in conventional external storage drives. The internal controller architecture integrates AES 256-bit hardware encryption for hardware-level password security managed directly through the Samsung Magician software suite across Windows, macOS, and Android platforms.
The physical housing measures 3.54 x 2.56 x 0.33 in (90 x 65 x 8.3 mm) and weighs 3.39 oz (96 g), engineered into a slim, drop-resistant external enclosure. With an operational thermal threshold rated between 0 and 60 °C (32 to 140 °F) and storage tolerance from -40 to 85 °C (-40 to 185 °F), heat generated by high-speed transfer bursts is passively transferred to the exterior casing. Because high-bandwidth solid-state drives operating at several gigabytes per second generate considerable localized heat during prolonged transfers, thermal transfer efficiency through the chassis is crucial for keeping controller throttling at bay.
In practical deployment, achieving the maximum rated 4,000 MB/s read and 3,800 MB/s write speeds requires a host system equipped with a native 40 Gbps USB4 port. The controller does not incorporate legacy Intel Thunderbolt certification, which means connection to older Thunderbolt-only ports or standard USB 3.2 Gen 2 hosts will operate under fallback bus bandwidth limits. For modern USB4-equipped production workstations and portable setups, it offers resilient drop resistance, hardware encryption, and robust high-capacity file transfer capability.
Technical Specifications
| Brand | Samsung |
| Model | Portable SSD P9 |
| Model Number | MU-PJ2T0G |
| Storage Capacity | 2 TB |
| Host Interface | USB4 Gen 3x2 (40 Gbps) |
| Connector | USB Type-C |
| Form Factor | Portable External SSD |
| Max Sequential Read | 4,000 MB/s |
| Max Sequential Write | 3,800 MB/s |
| Sustained Write Speed | 2,000 MB/s |
| Dimensions | 3.54 x 2.56 x 0.33 in (90 x 65 x 8.3 mm) |
| Weight | 3.39 oz (96 g) |
| Hardware Encryption | 256-bit AES |
| Security Features | Password protection |
| Durability Rating | Drop resistant |
| Operating Temperature | 32 - 140 °F (0 - 60 °C) |
| Storage Temperature | -40 - 185 °F (-40 - 85 °C) |
| Supported Operating Systems | Windows, macOS, Android |
| Management Software | Samsung Magician Software |
| Color | Black |
Primary Sources & Audited Citations
Recommended Alternatives in Storage (SSDs & HDDs)
At a Glance
How reliable is the Samsung Portable SSD P9 2TB Review: Sustained 2 GB/s USB4 Throughput according to Mizex audits?
Ideal for creative professionals and high-bandwidth workflows with USB4 hosts, provided they do not rely on legacy Thunderbolt-only host environments.
What are the known quirks or drawbacks of the Samsung Portable SSD P9 2TB Review: Sustained 2 GB/s USB4 Throughput?
Our reliability audit identified the following documented caveats:
- Requires a host system with a dedicated 40 Gbps USB4 port to achieve maximum rated speeds
- Lacks native Thunderbolt support, defaulting to lower bus speeds on non-USB4 host ports
What are the key engineering highlights of the Samsung Portable SSD P9 2TB Review: Sustained 2 GB/s USB4 Throughput?
The top strengths recorded in our evaluation include:
- Up to 4,000 MB/s sequential read and 3,800 MB/s sequential write speeds over 40 Gbps USB4
- Sustained steady-state write performance maintaining up to 2,000 MB/s during large data transfers
- Ultra-slim 0.33 in (8.3 mm) profile and lightweight 3.39 oz (96 g) drop-resistant chassis
- Hardware-based AES 256-bit encryption with password protection via Samsung Magician