Product comparison · 2 external hard drives

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

13specifications compared
9differ
4identical
17known for one product only

Key differences

HDD capacity
- 20GB USB 2.0 Pocket hard disk drive:20 GB
- Hard Drive 3.5" 500GB:500 GB
HDD speed
- 20GB USB 2.0 Pocket hard disk drive:4200 RPM
- Hard Drive 3.5" 500GB:7200 RPM
HDD size
- 20GB USB 2.0 Pocket hard disk drive:1.8"
- Hard Drive 3.5" 500GB:3.5"
Storage drive average seek time
- 20GB USB 2.0 Pocket hard disk drive:15 ms
- Hard Drive 3.5" 500GB:9 ms
Storage drive buffer size
- 20GB USB 2.0 Pocket hard disk drive:0.5 MB
- Hard Drive 3.5" 500GB:2 MB
Operating temperature (T-T)
- 20GB USB 2.0 Pocket hard disk drive:0 - 50 °C
- Hard Drive 3.5" 500GB:5 - 60 °C
Width
- 20GB USB 2.0 Pocket hard disk drive:100 mm
- Hard Drive 3.5" 500GB:200 mm
Depth
- 20GB USB 2.0 Pocket hard disk drive:60 mm
- Hard Drive 3.5" 500GB:115 mm

Side by side

Differences highlightedShow differences only

Comparison of 20GB USB 2.0 Pocket hard disk drive, Hard Drive 3.5" 500GB
30 specifications	A Acer 20GB USB 2.0 Pocket hard disk drive View product	B Freecom Hard Drive 3.5" 500GB View product
Hard drive5 differ
HDD capacityDiffers	20 GB	500 GB
HDD speedDiffers	4200 RPM	7200 RPM
HDD sizeDiffers	1.8"	3.5"
Type	HDD	HDD
Storage drive average seek timeDiffers	15 ms	9 ms
Storage drive buffer sizeDiffers	0.5 MB	2 MB
Ports & interfacesidentical
Maximum data transfer rateKnown for one	Unknown — not stated by the source	480 Mbit/s
USB connector	USB	USB
USB version	2.0	2.0
Featuresidentical
Product colourKnown for one	Unknown — not stated by the source	Silver
Operational conditions1 differ
Operating temperature (T-T)Differs	0 - 50 °C	5 - 60 °C
Storage temperature (T-T)Known for one	Unknown — not stated by the source	-20 - 80 °C
Operating relative humidity (H-H)Known for one	5 - 90%	Unknown — not stated by the source
Weight & dimensions3 differ
WidthDiffers	100 mm	200 mm
DepthDiffers	60 mm	115 mm
HeightDiffers	8.7 mm	40 mm
WeightKnown for one	Unknown — not stated by the source	750 g
Packaging dataidentical
Bundled softwareKnown for one	Unknown — not stated by the source	Freecom Software Media Suite
Other featuresidentical
Average latencyKnown for one	Unknown — not stated by the source	4.2 ms
Internal	No	No
Mac compatibilityKnown for one	Unknown — not stated by the source	Yes
Mean time between failures (MTBF)Known for one	Unknown — not stated by the source	50000 h
Minimum RAMKnown for one	Unknown — not stated by the source	128 MB
Minimum processorKnown for one	Unknown — not stated by the source	Pentium-III 700MHz
Minimum system requirementsKnown for one	Unknown — not stated by the source	CD-ROM
Track to track seek timeKnown for one	Unknown — not stated by the source	0.8 ms
Compatible operating systemsKnown for one	Unknown — not stated by the source	Windows 2000/XP Mac OS X 10.1 +
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

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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