Product comparison · 2 external hard drives

Seagate 1TB Expansion Portable USB 2.0 vs Seagate Expansion Portable Drives 640 GB

Key differences

HDD capacity
- 1TB Expansion Portable USB 2.0:1 TB
- Expansion Portable Drives 640 GB:640 GB
Weight
- 1TB Expansion Portable USB 2.0:310 g
- Expansion Portable Drives 640 GB:160 g
Dimensions (WxDxH)
- 1TB Expansion Portable USB 2.0:151.64 x 84.07 x 26.92 mm
- Expansion Portable Drives 640 GB:80.01 x 17.60 x 141.29 mm

Differences highlightedShow differences only

Comparison of 1TB Expansion Portable USB 2.0, Expansion Portable Drives 640 GB
23 specifications	A Seagate 1TB Expansion Portable USB 2.0 View product	B Seagate Expansion Portable Drives 640 GB View product
Hard drive1 differ
HDD capacityDiffers	1 TB	640 GB
HDD speed	5400 RPM	5400 RPM
HDD size	2.5"	2.5"
Type	HDD	HDD
Ports & interfacesidentical
Maximum data transfer rate	480 Mbit/s	480 Mbit/s
USB connector	USB	USB
USB version	2.0	2.0
USB data transfer rates	480 Mbit/s	480 Mbit/s
Featuresidentical
Product colour	Black	Black
Plug and PlayKnown for one	Yes	Unknown — not stated by the source
Securityidentical
Fingerprint reader	No	No
Poweridentical
Bus powered	USB	USB
Weight & dimensions1 differ
WidthKnown for one	151.6 mm	Unknown — not stated by the source
DepthKnown for one	84.1 mm	Unknown — not stated by the source
HeightKnown for one	26.9 mm	Unknown — not stated by the source
WeightDiffers	310 g	160 g
Other features1 differ
Connectivity technology	Wired	Wired
Internal	No	No
Mac compatibility	Yes	Yes
Compatible operating systems	Windows Vista, Windows XP Mac OSX 10.4.8	Windows Vista, Windows XP Mac OSX 10.4.8
Dimensions (WxDxH)Differs	151.64 x 84.07 x 26.92 mm	80.01 x 17.60 x 141.29 mm
USB 2.0 ports quantityKnown for one	Unknown — not stated by the source	1
USB requiredKnown for one	Unknown — not stated by the source	Yes

A dash means the value is not stated by the source. Unknown values are never counted for or against a product, and there is no overall score.