Seagate Expansion Desktop Hard Drive 8TB
- Digital Storage Capacity: 8 TB
- HardDrive Size: 8 TB
- Hard Disk Interface: USB 3.0
- Hardware Connectivity: USB 3.0
Last refreshed Sep 7, 2026 · Based on the Amazon listing and published specifications, not hands-on testing.
An 8TB USB 3.0 external hard drive built for backup and cold storage, plug and play on Windows and reformatted for Mac Time Machine, best used as a secondary copy rather than a primary drive.
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ASIN: B092R5KTT7Model: STKP8000400Category: External Hard Drives
Sizes Available
Styles Available
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Overview
Seagate's Expansion desktop drive (STKP8000400) is an 8TB USB 3.0 external for backup and cold storage, plug and play on Windows with no software, and reformatted for Mac Time Machine. It suits a secondary or offsite backup copy rather than a primary working drive.
- 8TB capacity over USB 3.0
- 18 inch USB cable and power adapter included
- 1 year limited warranty plus 1 year data rescue service
- Reformat required before use with Time Machine
Who it's for
Anyone building a second or third backup copy of large media libraries, or storing bulk PC or console game installs where load speed does not matter. Not for someone who needs a single drive to hold their only copy of important data.
Pros and cons
- Plug and play with no driver install on Windows or Mac
- Quiet during sequential backup style transfers
- Seagate honored an RMA claim on a failed unit
- Mechanical reliability varies a lot between individual units
- Gets noticeably louder during random read and write
- Windows Bitlocker may auto encrypt part of the drive on first use
Performance notes
A sequential copy of 6TB of photos took about 60 hours in one report, roughly 28 MB/s, in line with a large mechanical drive limited by disk mechanics rather than the USB 3.0 interface. The drive runs quiet during sequential backup style transfers but produces audible thumping during random read and write. It auto detects Windows and Mac, though Time Machine backups need a reformat first.
Specifications
| Brand | Seagate |
|---|---|
| Model | STKP8000400 |
| Dimensions & fit | |
| HardDrive Size | 8 TBhigher than 93% of 30 external hard drives |
| Cache Memory Installed Size | 0.01 TB |
| Item Weight | 2.9 poundshigher than 96% of 24 external hard drives |
| Item Dimensions L x W x Thickness | 8.6 × 8.4 × 3.1 inches |
| Capacity & performance | |
| Digital Storage Capacity | 8 TBhigher than 81% of 148 external hard drives |
| Construction & materials | |
| Enclosure Material | Information Not Available |
| Color | DESKTOP |
| Compatibility & installation | |
| Hard Disk Interface | USB 3.0 |
| Hardware Connectivity | USB 3.0 |
| Connectivity Technology | USB |
| Compatible Video Game Console Models | Sony PlayStation 4 |
| Compatible Devices | Desktop |
| Included components | |
| Customer Package Type | [FFP-Like] |
| Unit Count | 1 |
| Warranty & support | |
| Warranty Description | 2 years |
| Other details | |
| Form Factor | 3.5-inch |
| Hard Disk Form Factor | 2.5 inches |
| Hard Disk Description | Mechanical Hard Disk |
| Data Transfer Rate | 5000 Mbpshigher than 50% of 21 external hard drives |
| Number of Items | 1 |
| Additional Features | Data Recovery Service |
| Mfr Part Number | STKP8000400 |
| Specific Uses For Product | Personal |
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Frequently asked questions
Does the Seagate Expansion STKP8000400 work with Mac out of the box?
It auto-detects Mac and Windows, but for Apple Time Machine backups the drive needs to be reformatted first, per Seagate's own instructions.
How reliable is this Seagate 8TB drive long term?
Owner reports are mixed: some units run for years without issue while others fail within weeks, so it is best used as one copy in a multi-drive backup routine rather than a sole backup.
What is included with the Seagate Expansion desktop drive?
An 18 inch USB 3.0 cable and an 18W power adapter ship with the drive, along with a 1-year limited warranty and a 1-year Rescue data recovery service.