IN STOCK
Own it from $10 per week
Pay in 4 interest-free payments of $74.75
Include a Back Up Plan?
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Key Features
- Large storage capacity of 4TB for files and documents.
- Compact and portable design.
- Fast data transfer speeds with USB 3.0 interface.
- Easy plug-and-play setup with no software required.
- Compatible with Windows and Mac computers.
Expansion portable hard drive
The Seagate Expansion portable hard drive is compact and perfect for on-the-go. Instantly add storage space to your computer and take large files with you when you travel.
Plug-in Instant Storage
Add extra storage in seconds with Seagate Expansion drives. With high-capacity desktop options, portable HDD options that fit in your pocket, and SSDs that are super light and credit card-sized — there is an Expansion drive for you.
Easy-to-Use Storage Solution
Easily start saving your digital files in seconds. All you have to do is plug it in — then drag and drop!
Rescue Data Recovery Services | We’ve Got Your Back
When the unexpected happens — like water damage or natural disaster —Rescue Services help you defend against data loss and retrieval costs, so you can rest easier.3
Why choose the Expansion portable hard drive?
Built for on-the-go, take on large files with up to 5 TB capacity (about 320,000 digital photos).
1 Reformatting may be required for use with Time Machine
2 Compatibility may vary depending on user’s hardware configuration and operating system.
3 Rescue Data Recovery Services not available in all countries.
Specifications
Global
- External Hard Drive Type: Portable
- Model Number: STKM4000400
General
- Colour: Black
Features
- Auto Backup: No
- Compact And Light: Yes
- Firewire Ports: No
- Full Hd Optimized: No
- Mac Compatible: Yes
- Password Protection: No
- Plug And Play: No
- Pre-Formatted: No
- Shock Resistant: No
- Windows Compatible: Yes
Memory/Storage
- Storage Capacity (GB): 4000
Compatibility
- System Requirement: Windows and macOS
Interfaces/Ports
- Interface: USB 3.0
Dimensions
- Depth: 20.9mm
- Height: 115.3mm
- Width: 80mm
Weight
- Weight (Kg): 0.257
In The Box & Warranty
- Included: Seagate® Expansion portable hard drive 18 inch (46 cm) USB 3.0 cable Quick start guide Limited Warranty: AMER - 1 year, EMEA - 2 years, APAC - 3 years Rescue Data Recovery Services
- Warranty (Years): 1
Why Buy?
Your Files, Ready Whenever You Are
If you've ever lost important files, run out of storage space, or just needed a simple way to back everything up, this Seagate portable drive quietly solves all of that — without any fuss.
With 4TB of storage, you can keep years' worth of photos, videos, work documents, music, and more in one place. There's no software to install and no complicated setup — just plug it in and it starts working straight away. Moving large files is fast enough that you won't be sitting around waiting, which makes backing up or transferring content something you'll actually do rather than put off.
It's compact enough to slip into a bag or drawer, so it fits neatly into your routine whether you're working from home, heading to the office, or travelling. It works with both Windows and Mac, so there's no compatibility headache if you switch between devices or share files with someone using a different computer. Simple, reliable, and genuinely useful day to day.
Buy This If…
- You've run out of storage on your laptop or desktop
- You want a straightforward way to back up important files
- You work with large photos, videos, or creative projects
- You need something portable you can take between home and work
- You want a no-fuss solution that works on both Mac and Windows







