Product comparison · 2 external hard drives

Acer 20GB USB 2.0 Pocket hard disk drive vs Acer 80GB USB 2.0 external hard disk drive

Key differences

HDD capacity
- 20GB USB 2.0 Pocket hard disk drive:20 GB
- 80GB USB 2.0 external hard disk drive:80 GB
HDD size
- 20GB USB 2.0 Pocket hard disk drive:1.8"
- 80GB USB 2.0 external hard disk drive:2.5"
Storage drive average seek time
- 20GB USB 2.0 Pocket hard disk drive:15 ms
- 80GB USB 2.0 external hard disk drive:12 ms
Storage drive buffer size
- 20GB USB 2.0 Pocket hard disk drive:0.5 MB
- 80GB USB 2.0 external hard disk drive:2 MB
Width
- 20GB USB 2.0 Pocket hard disk drive:100 mm
- 80GB USB 2.0 external hard disk drive:146 mm
Depth
- 20GB USB 2.0 Pocket hard disk drive:60 mm
- 80GB USB 2.0 external hard disk drive:75 mm
Height
- 20GB USB 2.0 Pocket hard disk drive:8.7 mm
- 80GB USB 2.0 external hard disk drive:14 mm
Dimensions (WxDxH)
- 20GB USB 2.0 Pocket hard disk drive:100 x 60 x 8.7 mm
- 80GB USB 2.0 external hard disk drive:146 x 75 x 14 mm

Differences highlightedShow differences only

Comparison of 20GB USB 2.0 Pocket hard disk drive, 80GB USB 2.0 external hard disk drive
19 specifications	A Acer 20GB USB 2.0 Pocket hard disk drive View product	B Acer 80GB USB 2.0 external hard disk drive View product
Hard drive4 differ
HDD capacityDiffers	20 GB	80 GB
HDD speed	4200 RPM	4200 RPM
HDD sizeDiffers	1.8"	2.5"
Type	HDD	HDD
Storage drive average seek timeDiffers	15 ms	12 ms
Storage drive buffer sizeDiffers	0.5 MB	2 MB
Ports & interfacesidentical
USB connector	USB	USB
USB version	2.0	2.0
Featuresidentical
LED indicatorsKnown for one	Unknown — not stated by the source	Power
Operational conditionsidentical
Operating temperature (T-T)	0 - 50 °C	0 - 50 °C
Storage temperature (T-T)Known for one	Unknown — not stated by the source	-20 - 70 °C
Operating relative humidity (H-H)	5 - 90%	5 - 90%
Weight & dimensions3 differ
WidthDiffers	100 mm	146 mm
DepthDiffers	60 mm	75 mm
HeightDiffers	8.7 mm	14 mm
Other features1 differ
Drive device, transfer rate	480 MB/s	480 MB/s
Internal	No	No
Dimensions (WxDxH)Differs	100 x 60 x 8.7 mm	146 x 75 x 14 mm
I/O portsKnown for one	1 x mini-USB Type B	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.