Product comparison · 2 external hard drives

Acer 100GB USB 2.0 external hard disk drive vs Acer 20GB USB 2.0 Pocket hard disk drive

Key differences

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

Differences highlightedShow differences only

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

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.