ADATA 2.5" Portable HDD vs ADATA NH01 Portable USB3.0 640GB

Comparison of 2.5" Portable HDD, NH01 Portable USB3.0 640GB

25 specifications	A ADATA 2.5" Portable HDDView product	B ADATA NH01 Portable USB3.0 640GBView product
Hard drive1 differ
HDD capacityDiffers	320 GB	640 GB
HDD speed	5400 RPM	5400 RPM
HDD size	2.5"	2.5"
Interface	Serial ATA	Serial ATA
Type	HDD	HDD
Read speed	88 MB/s	88 MB/s
Write speed	81 MB/s	81 MB/s
Ports & interfacesidentical
Maximum data transfer rate	4800 Mbit/s	4800 Mbit/s
Featuresidentical
Product colour	Black	Black
Plug and PlayKnown for one	—Unknown — not stated by the source	Yes
Poweridentical
Bus poweredKnown for one	—Unknown — not stated by the source	USB
Weight & dimensionsidentical
WidthKnown for one	—Unknown — not stated by the source	82 mm
DepthKnown for one	—Unknown — not stated by the source	134 mm
HeightKnown for one	—Unknown — not stated by the source	15.7 mm
Weight	240 g	240 g
Other featuresidentical
Disks included quantity	1 pc(s)	1 pc(s)
Internal	No	No
Mac compatibility	Yes	Yes
MaterialKnown for one	—Unknown — not stated by the source	Aluminium
Quick start guideKnown for one	—Unknown — not stated by the source	Yes
USB 3.2 Gen 1 (3.1 Gen 1) ports quantity	1	1
USB cableKnown for one	—Unknown — not stated by the source	USB
USB required	Yes	Yes
Compatible operating systems	Windows 2000/XP/Vista/7 Mac X 10.4 +	Windows 2000/XP/Vista/7 Mac X 10.4 +
Dimensions (WxDxH)	82 x 134 x 15.7 mm	82 x 134 x 15.7 mm

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.