Seagate Expansion Portable Hard Drive USB 3.2 Gen 1 (3.1 Gen 1)
Seagate
Seagate Expansion Portable Hard Drive USB 3.2 Gen 1 (3.1 Gen 1)
The Seagate Expansion Portable Hard Drive USB 3.2 Gen 1 (3.1 Gen 1) is a compact 2.5" bus-powered drive designed for travellers and everyday users who need to carry large files between their PC, Mac, or Chromebook without carrying a power adapter. It connects instantly with no software or drivers required, and every unit includes Seagate Rescue Data Recovery Services for added confidence.
Why this product
Plug-and-play, no drivers needed
It connects via USB and is recognised immediately by Windows, macOS, and ChromeOS — no software installation required.
Bus-powered — no power brick
It draws power directly from the USB port, so there is nothing extra to pack or plug in when you travel.
Cross-platform out of the box
It arrives preformatted in exFAT, which both Windows and macOS can read and write without reformatting.
USB 3.0 with USB 2.0 fallback
The USB 3.2 Gen 1 interface also works with older USB 2.0 ports, so it is compatible with a wide range of existing hardware.
Rescue Data Recovery Services included
Every unit ships with access to Seagate's Rescue Data Recovery Services at no extra cost (availability varies by country).
18-inch cable in the box
A 45.72 cm USB 3.0 cable is included, so it is ready to use straight from the packaging.
- Capacity1 TB
- Drive TypeHDD (SMR)
- InterfaceUSB 3.2 Gen 1 (USB 3.0); backwards compatible with USB 2.0
- Form Factor2.5"
- Dimensions115.3 × 80.0 × 12.6 mm
- File SystemexFAT
- Warranty1 yr (AMER) / 2 yr (EMEA) / 3 yr (APAC)
- SKUSEA-470-1TB
- EAN3660619040148
- Capacity2 TB
- Drive TypeHDD (SMR)
- InterfaceUSB 3.2 Gen 1 (USB 3.0); backwards compatible with USB 2.0
- Form Factor2.5"
- Dimensions115.3 × 80.0 × 12.6 mm
- File SystemexFAT
- Warranty1 yr (AMER) / 2 yr (EMEA) / 3 yr (APAC)
- SKUSEA-471-2TB
- EAN4069743789111
- Capacity4 TB
- Drive TypeHDD (SMR)
- InterfaceUSB 3.2 Gen 1 (USB 3.0); backwards compatible with USB 2.0
- Form Factor2.5"
- Dimensions115.3 × 80.0 × 20.9 mm
- File SystemexFAT
- Warranty1 yr (AMER) / 2 yr (EMEA) / 3 yr (APAC)
- SKUSEA-472-4TB
- EAN3660619040254
- Capacity5 TB
- Drive TypeHDD (SMR)
- InterfaceUSB 3.2 Gen 1 (USB 3.0); backwards compatible with USB 2.0
- Form Factor2.5"
- Dimensions115.3 × 80.0 × 20.9 mm
- File SystemexFAT
- Warranty1 yr (AMER) / 2 yr (EMEA) / 3 yr (APAC)
- SKUSEA-473-5TB
- EAN3660619040261
- Windows 10, Windows 8, and Windows 7
- macOS (any version that supports exFAT and USB storage)
- ChromeOS
- Any host with a USB 3.0 / USB 3.2 Gen 1 port for full-speed operation
- USB 2.0 ports are supported through backwards compatibility, but transfer speeds will be limited to USB 2.0 rates
- Rescue Data Recovery Services are not available in all countries — check Seagate's regional terms before relying on this benefit
Best for
- Travellers and commuters who need to carry large files between machines without bringing a power adapter
- Mixed-OS households or workplaces that need a drive readable by both Windows and macOS straight out of the box
- Users who want simple setup — no drivers, no software, just plug in and go
- Anyone who values data recovery cover at no additional cost, with Rescue Data Recovery Services bundled in
- Chromebook users who need external storage that is officially compatible with ChromeOS
Trade-offs
- Users needing fast transfer speeds — this is a 5400 RPM HDD, not an SSD, so sequential throughput is far below what a solid-state drive provides
- Workloads that depend on low latency — HDD seek times are significantly slower than NVMe or SATA SSD alternatives
- Users who need a higher-capacity portable drive in the thinner 12.6 mm profile — the 4 TB and 5 TB variants are 20.9 mm tall, noticeably thicker than the 1 TB and 2 TB options
- Buyers in AMER who want a longer warranty — the warranty in the Americas is 1 year, compared to 2 years in EMEA and 3 years in APAC
The Seagate® Expansion portable drive is compact and perfect for on-the-go. Instantly add more storage space to your PC or Mac and take large files with you when you travel.
Plus, Seagate Expansion comes with Rescue Data Recovery Services for additional peace of mind.
General
| Brand | Seagate |
|---|---|
| Model Number | STKM1000400 |
| Colour | Black |
| File System (Out of Box) | exFAT |
| What's in the Box | Expansion portable hard drive, 18-inch (45.72 cm) USB 3.0 cable, Quick start guide |
Drive
| Capacity | 1 TB |
|---|---|
| Drive Type | HDD (SMR — Shingled Magnetic Recording) |
| Form Factor | 2.5" |
| Rotational Speed | 5400 RPM |
| Connector | USB Micro-B |
Performance
| Interface | USB 3.2 Gen 1 (USB 3.1 Gen 1 / USB 3.0); backwards compatible with USB 2.0 |
|---|---|
| OS Compatibility | Windows 10, Windows 8, Windows 7; macOS; ChromeOS |
Power & Environment
| Power | Bus-powered via USB — no external power supply required |
|---|---|
| Height | 12.6 mm |
| Width | 80.0 mm |
| Length | 115.3 mm |
Reliability
| Warranty | 1 year (AMER) / 2 years (EMEA) / 3 years (APAC) |
|---|---|
| Included Services | Rescue Data Recovery Services (not available in all countries) |
General
| Brand | Seagate |
|---|---|
| Model Number | STKM2000400 |
| Colour | Black |
| File System (Out of Box) | exFAT |
| What's in the Box | Expansion portable hard drive, 18-inch (45.72 cm) USB 3.0 cable, Quick start guide |
Drive
| Capacity | 2 TB |
|---|---|
| Drive Type | HDD (SMR — Shingled Magnetic Recording) |
| Form Factor | 2.5" |
| Rotational Speed | 5400 RPM |
| Connector | USB Micro-B |
Performance
| Interface | USB 3.2 Gen 1 (USB 3.1 Gen 1 / USB 3.0); backwards compatible with USB 2.0 |
|---|---|
| OS Compatibility | Windows 10, Windows 8, Windows 7; macOS; ChromeOS |
Power & Environment
| Power | Bus-powered via USB — no external power supply required |
|---|---|
| Height | 12.6 mm |
| Width | 80.0 mm |
| Length | 115.3 mm |
Reliability
| Warranty | 1 year (AMER) / 2 years (EMEA) / 3 years (APAC) |
|---|---|
| Included Services | Rescue Data Recovery Services (not available in all countries) |
General
| Brand | Seagate |
|---|---|
| Model Number | STKM4000400 |
| Colour | Black |
| File System (Out of Box) | exFAT |
| What's in the Box | Expansion portable hard drive, 18-inch (45.72 cm) USB 3.0 cable, Quick start guide |
Drive
| Capacity | 4 TB |
|---|---|
| Drive Type | HDD (SMR — Shingled Magnetic Recording) |
| Form Factor | 2.5" |
| Rotational Speed | 5400 RPM |
| Connector | USB Micro-B |
Performance
| Interface | USB 3.2 Gen 1 (USB 3.1 Gen 1 / USB 3.0); backwards compatible with USB 2.0 |
|---|---|
| OS Compatibility | Windows 10, Windows 8, Windows 7; macOS; ChromeOS |
Power & Environment
| Power | Bus-powered via USB — no external power supply required |
|---|---|
| Height | 20.9 mm |
| Width | 80.0 mm |
| Length | 115.3 mm |
Reliability
| Warranty | 1 year (AMER) / 2 years (EMEA) / 3 years (APAC) |
|---|---|
| Included Services | Rescue Data Recovery Services (not available in all countries) |
General
| Brand | Seagate |
|---|---|
| Model Number | STKM5000400 |
| Colour | Black |
| File System (Out of Box) | exFAT |
| What's in the Box | Expansion portable hard drive, 18-inch (45.72 cm) USB 3.0 cable, Quick start guide |
Drive
| Capacity | 5 TB |
|---|---|
| Drive Type | HDD (SMR — Shingled Magnetic Recording) |
| Form Factor | 2.5" |
| Rotational Speed | 5400 RPM |
| Connector | USB Micro-B |
Performance
| Interface | USB 3.2 Gen 1 (USB 3.1 Gen 1 / USB 3.0); backwards compatible with USB 2.0 |
|---|---|
| OS Compatibility | Windows 10, Windows 8, Windows 7; macOS; ChromeOS |
Power & Environment
| Power | Bus-powered via USB — no external power supply required |
|---|---|
| Height | 20.9 mm |
| Width | 80.0 mm |
| Length | 115.3 mm |
Reliability
| Warranty | 1 year (AMER) / 2 years (EMEA) / 3 years (APAC) |
|---|---|
| Included Services | Rescue Data Recovery Services (not available in all countries) |
Every option side by side. Rows that differ between them are highlighted — those are the ones worth deciding on.
| 1 TB - STKM1000400 | 2 TB - STKM2000400 | 4 TB - STKM4000400 | 5 TB - STKM5000400 | |
|---|---|---|---|---|
| Capacity | 1 TB | 2 TB | 4 TB | 5 TB |
| Drive Type | HDD (SMR) | HDD (SMR) | HDD (SMR) | HDD (SMR) |
| Interface | USB 3.2 Gen 1 (USB 3.0); backwards compatible with USB 2.0 | USB 3.2 Gen 1 (USB 3.0); backwards compatible with USB 2.0 | USB 3.2 Gen 1 (USB 3.0); backwards compatible with USB 2.0 | USB 3.2 Gen 1 (USB 3.0); backwards compatible with USB 2.0 |
| Form Factor | 2.5" | 2.5" | 2.5" | 2.5" |
| Dimensions | 115.3 × 80.0 × 12.6 mm | 115.3 × 80.0 × 12.6 mm | 115.3 × 80.0 × 20.9 mm | 115.3 × 80.0 × 20.9 mm |
| File System | exFAT | exFAT | exFAT | exFAT |
| Warranty | 1 yr (AMER) / 2 yr (EMEA) / 3 yr (APAC) | 1 yr (AMER) / 2 yr (EMEA) / 3 yr (APAC) | 1 yr (AMER) / 2 yr (EMEA) / 3 yr (APAC) | 1 yr (AMER) / 2 yr (EMEA) / 3 yr (APAC) |
Shipping
All our products are shipped from the United Kingdom within 24 to 48 hours of purchase. See our Shipping and Returns page for full details.
Returns
- Tech Syndicate offers a full money-back guarantee on all purchases made in our store. If you are not satisfied with your purchase, we will provide a full refund, no questions asked.
- Refunds are available within 45 days of delivery.
- After the 45-day period you are no longer eligible for a refund, so we encourage you to try the product within the first few weeks to make sure it fits your needs.