Product comparison · 2 external hard drives

Acer 20GB USB 2.0 Pocket hard disk drive vs Iomega 500 GB 3.5" USB 2.0 Hard Drive

10specifications compared
6differ
4identical
15known for one product only

Key differences

HDD capacity
- 20GB USB 2.0 Pocket hard disk drive:20 GB
- 500 GB 3.5" USB 2.0 Hard Drive:500 GB
HDD speed
- 20GB USB 2.0 Pocket hard disk drive:4200 RPM
- 500 GB 3.5" USB 2.0 Hard Drive:7200 RPM
Storage drive buffer size
- 20GB USB 2.0 Pocket hard disk drive:0.5 MB
- 500 GB 3.5" USB 2.0 Hard Drive:8 MB
Width
- 20GB USB 2.0 Pocket hard disk drive:100 mm
- 500 GB 3.5" USB 2.0 Hard Drive:121 mm
Depth
- 20GB USB 2.0 Pocket hard disk drive:60 mm
- 500 GB 3.5" USB 2.0 Hard Drive:222 mm
Height
- 20GB USB 2.0 Pocket hard disk drive:8.7 mm
- 500 GB 3.5" USB 2.0 Hard Drive:34.9 mm

Side by side

Differences highlightedShow differences only

Comparison of 20GB USB 2.0 Pocket hard disk drive, 500 GB 3.5" USB 2.0 Hard Drive
25 specifications	A Acer 20GB USB 2.0 Pocket hard disk drive View product	B Iomega 500 GB 3.5" USB 2.0 Hard Drive View product
Hard drive3 differ
HDD capacityDiffers	20 GB	500 GB
HDD speedDiffers	4200 RPM	7200 RPM
Type	HDD	HDD
Storage drive buffer sizeDiffers	0.5 MB	8 MB
HDD sizeKnown for one	1.8"	Unknown — not stated by the source
Storage drive average seek timeKnown for one	15 ms	Unknown — not stated by the source
Ports & interfacesidentical
USB connector	USB	USB
USB version	2.0	2.0
Weight & dimensions3 differ
WidthDiffers	100 mm	121 mm
DepthDiffers	60 mm	222 mm
HeightDiffers	8.7 mm	34.9 mm
WeightKnown for one	Unknown — not stated by the source	1.26 kg
Other featuresidentical
HDD transfer rateKnown for one	Unknown — not stated by the source	480 Mbit/s
Internal	No	No
Mac compatibilityKnown for one	Unknown — not stated by the source	Yes
Minimum processorKnown for one	Unknown — not stated by the source	Pentium II / G3
Minimum system requirementsKnown for one	Unknown — not stated by the source	Microsoft Internet Explorer 5.0/Netscape 6.1
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
Compatible operating systemsKnown for one	Unknown — not stated by the source	Microsoft Windows 2000P / XP Home / XPP/ Vista Mac OS X 10.1.5 +
Drive device, transfer rateKnown for one	480 MB/s	Unknown — not stated by the source
Dimensions (WxDxH)Known for one	100 x 60 x 8.7 mm	Unknown — not stated by the source
I/O portsKnown for one	1 x mini-USB Type B	Unknown — not stated by the source
Operational conditionsidentical
Operating temperature (T-T)Known for one	0 - 50 °C	Unknown — not stated by the source
Operating relative humidity (H-H)Known for one	5 - 90%	Unknown — not stated by the source

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.

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