Seagate Expansion 4TB USB-A Portable HDD
Seagate Expansion 4TB 2.5" USB-A Portable External Hard Drive
Product Overview
Consolidate your expanding media files and protect your critical local data on the move with the Seagate Expansion 4TB Portable External HDD. Offering 4,000 GB of high-density storage within a sleek, pocket-sized 2.5-inch chassis, this drive is built to keep pace with an active digital lifestyle. It is the perfect mobile vault for creative professionals backing up raw footage on location, IT technicians carrying large software deployment packages, or everyday users securing full system image recovery backups.
Housed in a rugged, low-profile casing with a modern textured matte finish, the Expansion Portable drive offers absolute simplicity. Running entirely on bus power straight from your laptop or desktop's USB port, it completely eliminates the need for bulky external wall bricks or power cords. With high-speed USB 3.2 Gen 1 (USB 3.0) connectivity, you can drag, drop, and organize massive file directories instantly across Windows or Mac platforms with zero software installation requirements.
Key Features
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Massive 4TB On-The-Go Space: Secure a vast 4,000 GB mobile storage ceiling—plenty of room to carry up to 100,000 high-resolution photos, 1,000 full-length movies, or extensive historical system backups.
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True Bus-Powered Mobility: Designed for true cord-free convenience, drawing all necessary operational power straight from your computer’s USB port.
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Instant Drag-and-Drop Usability: Ready to deploy right out of the packaging. Simply connect the included SuperSpeed USB cable to your computer to begin transferring folders instantly.
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Seamless Cross-Platform Compatibility: Out-of-the-box driver recognition across both Windows® and Mac® operating systems removes the hassle of complicated manual partitioning or setups.
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SuperSpeed USB 3.2 Connectivity: Leverages full 5Gbps USB 3.2 Gen 1 (USB 3.0) infrastructure to ensure smooth, continuous file handshakes and rapid file transfers.
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Seagate Rescue Data Recovery Services: Includes complimentary access to Seagate's world-class Rescue Data Recovery Services, safeguarding your data against accidental deletion, corruption, or hardware damage.
Technical Specifications
| Attribute | Specification |
| Brand | Seagate |
| Product Line | Expansion Portable Series |
| Model Number | STKM4000400 |
| Capacity | 4TB (4,000 GB) |
| Form Factor | 2.5-Inch Portable |
| Drive Architecture | Mechanical External Hard Drive (HDD) |
| Rotational Velocity | 5,400 RPM |
| Host Interface Port | USB 3.2 Gen 1 / USB 3.0 Type-A (Backwards compatible with USB 2.0) |
| Bus-Powered | Yes (5V via host USB cable; no external power brick required) |
| Data Protection Tier | Seagate Rescue Data Recovery Services Included |
| Backup Management | Toolkit Smart Mirror & Backup Suite (Available via Download) |
| OS Compatibility | Windows® 10 or later; macOS® X 10.12 or later (Note: Reformatting required for Mac Time Machine use) |
| Enclosure Treatment | Textured Matte Black / Impact-Resistant ABS |
| Dimensions (L x W x H) | 115.30mm x 80.00mm x 20.90mm (4.54" x 3.15" x 0.82") |
| Weight | ~257g (0.57 lbs) |
| Regulatory Clearances | RoHS Compliant, CE, FCC, RCM, UKCA, VCCI |
| Manufacturer Warranty | 2-Year Limited Carry-in Warranty |
What’s in the Box?
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1 x Seagate Expansion 4TB 2.5" External Portable Hard Drive
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1 x 18-inch (45.72cm) SuperSpeed USB 3.0 / USB 3.2 Gen 1 Type-A Connection Cable
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1 x Quick Start Setup Guide
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1 x Seagate Rescue Data Recovery Services activation document