Features

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General
Sales Package EHDD, Cable, Warranty Card  Portable Hard Drive, USB 3.0 Cable, Quick Install Guide  Portable Hard Drive, USB 3.0 Cable, Quick Install Guide 
Model Name HD-SL1/SC1 IN//HD-SL1/SO1 IN  WDBS4B0020BWT-WESN  WDBHDW0040BBK-EESN 
Type HDD  HDD  HDD 
Capacity 1 TB  2 TB  4 TB 
Color Silver  White  Black 
System Requirements Windows 8.1 (32 bit / 64 bit), Windows 8 (32 bit / 64 bitView More... Windows 7, Windows 8, Windows 8.1, Windows 10  Windows 7, Windows 8, Windows 8.1, Windows 10 
Form Factor Portable  Portable  Portable 
Wired|Wireless Wired  Wired  Wired 
Cloud Backup Yes No  No 
Additional Features
Number of Ports 1 
Connector Type USB 3.0 micro-b Connector 
Data Transfer Rate USB 3.0: Upto 5 Gb/s, USB 2.0: Upto 480 Mb/s  5 GB/s  5 GB/s 
Backward Compatible Yes
Password Protection Yes Yes
Other Features Display: High Color (More than 16 bit), 800 x 600 pixels,View More... Designed to Fit in the Palm, Back Up Automatically, Easy View More... Lightweight 
Encryption Built-in 256-bit AES Hardware Encryption with WD SecurityView More...
Power Features
Power Source USB-powered 
External Power Required No  No  No 
Power Requirement DC 5 V 
Power Consumption 4.5 W 
Dimensions
Cable Length 60 cm 
Width 81 mm  81.5 mm  82 mm 
Height 12 mm  110 mm  110.5 mm 
Depth 118 mm  13.8 mm  21 mm 
Weight 190 g  170 g  234 g 
Warranty
Warranty Summary 3 Years Warranty  3 Years Worldwide Warranty  3 Years Limited Warranty 
Warranty Service Type Carry In  Carry In  Carry In 
Covered in Warranty All  Manufacturing Defects  Manufacturing Defects 
Not Covered in Warranty Physical Damages  Physical Damages  Physical Damages 
Domestic Warranty 3 Year  3 Year  3 Year