Product Price Storage Capacity (TB) Interface Type Transfer Speed (MB/s) Dimensions (mm x mm x mm) Weight (g) Power Supply Warranty (years)
Western Digital WD Ultrastar DC HC680 28TB WD2820KK (external-ready)
US
£745.14 28TB SATA Up to 265 MB/s 5 years

The Ultrastar DC HC680 is a 3.5in 28TB enterprise data-center HDD using SMR, 7200 RPM, OptiNAND and HelioSeal for very high capacity and improved efficiency; it's designed for cloud and hyperscale storage where high density and low cost per TB matter. It suits deployments that can tolerate SMR characteristics and require large, power-efficient archival storage.

★ Ideal for

Ideal for buyers seeking the largest external-capacity drive at a reasonable price because it offers 28TB capacity and enterprise power efficiency (28TB, 7200 RPM, up to 265 MB/s).

Seagate Expansion External Desktop Drive 28TB STKP28000400
US
£633.38 28 TB USB 3.0 (USB-C cable included) 178.75 mm x 41.90 mm 1176 g External power adapter (included) 1 year limited warranty

The Seagate Expansion 28TB STKP28000400 is a high-capacity desktop external HDD with USB 3.0 connectivity and an external power adapter, designed for large media libraries, backups, and bulk storage. It offers plug-and-play setup for Windows and macOS and includes Rescue Data Recovery Services and a limited warranty.

★ Ideal for

Ideal for users seeking the largest single-drive external capacity at a reasonable price because it provides 28 TB of storage with USB 3.0 connectivity and an external power adapter.

Seagate Seagate Exos X30 External 30TB ST30000NM003G
US
£894.18 30TB SATA 6 Gb/s 275 MB/s 147.00mm x 101.85mm x 26.10mm 5-Year

The Seagate Exos X30 30TB is an enterprise-class, high-density 3.5 in HDD using HAMR/Mozaic technology to deliver very large single-drive capacity with 7200 RPM performance and a 512MB cache. It targets data centers and heavy-duty storage arrays where maximizing capacity per bay and sustained transfer rates matter. It includes enterprise features like Seagate Secure and a five-year warranty.

★ Ideal for

Ideal for this question because it offers the largest single-drive capacity at 30TB with sustained transfer speeds around 275 MB/s and enterprise reliability, giving maximum storage per drive at a competitive enterprise price.