We take cryptocurrency — so the coins you hold can buy real hardware.Pay in crypto, spend it on real hardware. Free insured shipping worldwide over $399. Plain, unbranded boxes, sent from Germany.Free insured shipping over $399. Your rate is locked for 30 minutes once checkout opens.Rate locked 30 minutes. Every item sealed, serial-checked and covered by a 24-month warranty.Sealed, 24-month warranty.

Saved items Sign in
Black rectangular desktop hard drive enclosure, 3.5 inch form factor, USB 3.0 cable and power adapter included

Seagate

Seagate Expansion 20TB external hard drive USB 3.0 STKP20000400

SKU CH-DAAP-X0KXH MPN STKP20000400

20 TB desktop external hard drive with USB 3.0 interface and included Rescue Data Recovery Services

  • Total capacity20 TB
  • Interface typeUSB 3.0
  • Form factor3.5 in (8.89 cm)
  • Setup requirementsCompatible with most Windows and macOS1 systems. Visit seaga
  • Product colorBlack
  • Product dimensions7.03 in × 1.65' 'x 4.92

Capacity 20TB

  • 20TB capacity stores massive media libraries and backups
  • USB 3.0 interface delivers fast file-transfer speeds
  • Plug-and-play setup recognised automatically by Windows and macOS
  • Includes Rescue Data Recovery Services for added file protection
  • 5-inch desktop form factor with 18W power adapter included

20TB desktop storage for backups and archives

The Seagate Expansion 20TB desktop drive adds high-capacity external storage for users who need to back up large media libraries, project files or system images. It connects through a single USB 3.0 port and requires its own power adapter, so it suits a fixed workstation rather than mobile use. The drive arrives formatted for Windows and is recognised automatically by macOS after a quick reformat for Time Machine.

Plug-and-play setup with one common issue

Installation is straightforward: attach the 18W power adapter, connect the supplied 18-inch USB 3.0 cable and the drive appears in the file manager within seconds. No driver installation is needed on supported Windows or macOS versions. The only frequent stumbling block is forgetting the external power brick — the 3.5-inch mechanism will not spin up on bus power alone, so the drive stays invisible until the adapter is plugged in.

Verify port type and reformat needs before ordering

Your computer must provide a USB 3.0 port to achieve the rated transfer speed; older USB 2.0 ports will work but at reduced throughput. macOS users planning to use Time Machine should budget time for the required reformat to APFS or HFS+. The package includes the drive, cable, power adapter and a quick start guide, plus access to Rescue Data Recovery Services for added data protection.

How it compares

Measured against everything we stock in High-Capacity External Drives, at today’s prices. Recalculated every night.

Price $360.99
Typical for this category: the median of 144 items is $379.99.
Total capacity 20 TB
Higher than about 80% of the 101 comparable items (median 12 TB).
Price per TB $18.05 per TB
Cheaper than about 92% of the 101 comparable items (median $37.00 per TB).

New to this? Paying with USDT: TRC-20 or ERC-20 — what to check, what it costs to pay, and what is never asked for.

Specifications

Product
Brand nameSeagate
Product lineExpansion
Model nameSTKP18000400
Total capacity20 TB
Product colorBlack
Ports & slots
Interface typeUSB 3.0
Size & build
Form factor3.5 in (8.89 cm)
Product dimensions7.03 in × 1.65' 'x 4.92
Product weight2.59 lb (1.17 kg)
Shipping weight1.36 kg
Package size216 × 216 × 76 mm
In the box
In the boxSeagate® Expansion desktop hard drive
18 in (45.72 cm) USB 3.0 cable
18 W power adapter
Quick Start Guide
Rescue Data Recovery Services 3

Other versions of this model

5 more in the same range

Questions about this item

How do I verify the 20TB drive is working after connecting the 18W power adapter and 18-inch USB 3.0 cable?

The drive appears in Windows File Explorer or macOS Finder once plugged in; open it and copy a test file to confirm read and write access.

What comes in the box and what must I purchase separately for the STKP20000400?

The package includes the 3.5-inch drive, 18-inch USB 3.0 cable, 18W power adapter, quick start guide and Rescue Data Recovery Services; no extra items are required for basic operation.

Which capacity version of the Seagate Expansion desktop drive should I choose?

This model provides 20TB of storage; select it if you need that capacity, otherwise consider the other Expansion capacities offered by Seagate.

More in High-Capacity External Drives

Similar items