Product comparison · 2 external hard drives

Acer 20GB USB 2.0 Pocket hard disk drive vs Acer 500GB 2.5" Slim External Hard Disc Drive

Key differences

HDD capacity
- 20GB USB 2.0 Pocket hard disk drive:20 GB
- 500GB 2.5" Slim External Hard Disc Drive:500 GB
HDD size
- 20GB USB 2.0 Pocket hard disk drive:1.8"
- 500GB 2.5" Slim External Hard Disc Drive:2.5"
Width
- 20GB USB 2.0 Pocket hard disk drive:100 mm
- 500GB 2.5" Slim External Hard Disc Drive:74 mm
Depth
- 20GB USB 2.0 Pocket hard disk drive:60 mm
- 500GB 2.5" Slim External Hard Disc Drive:111 mm
Height
- 20GB USB 2.0 Pocket hard disk drive:8.7 mm
- 500GB 2.5" Slim External Hard Disc Drive:14 mm

Differences highlightedShow differences only

Comparison of 20GB USB 2.0 Pocket hard disk drive, 500GB 2.5" Slim External Hard Disc Drive
19 specifications	A Acer 20GB USB 2.0 Pocket hard disk drive View product	B Acer 500GB 2.5" Slim External Hard Disc Drive View product
Hard drive2 differ
HDD capacityDiffers	20 GB	500 GB
HDD speedKnown for one	4200 RPM	Unknown — not stated by the source
HDD sizeDiffers	1.8"	2.5"
Storage drive average seek timeKnown for one	15 ms	Unknown — not stated by the source
Storage drive buffer sizeKnown for one	0.5 MB	Unknown — not stated by the source
Ports & interfacesidentical
USB connectorKnown for one	USB	Unknown — not stated by the source
USB versionKnown for one	2.0	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
Weight & dimensions3 differ
WidthDiffers	100 mm	74 mm
DepthDiffers	60 mm	111 mm
HeightDiffers	8.7 mm	14 mm
WeightKnown for one	Unknown — not stated by the source	165 g
Other featuresidentical
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
USB 2.0 ports quantityKnown for one	Unknown — not stated by the source	1

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.