External Hard Drives Comparison

Western Digital Elements Portable 320GB, HP 557s Slim External DVD-RW
Select Model

Product

Western Digital Elements Portable 320GB

HP 557s Slim External DVD-RW

 General
 Average seek time 12 ms   
 Cache size 8 MB   
 Hot-Plug Yes No   
 RAID No No   
 Rotational speed 5400 RPM   
 Connectors
 eSATA No No   
 Firewire No No   
 Networking No   
 S-ATA No   
 USB Yes No   
 USB version 2.0   
 Design
 Available colours Black   
 Dimensions
 Dimensions (WxHxD) 79 203.82 124.4 mm   
 Form factor 2.5 inches   
 Weight 155 g   
 Features
 Built-in support for encryption No No   
 Display No No   
 Power supply
 Power supply Powerline, USB   
 Storage
 Hard drive size 250 GB   
 Price/GB $0.48 / GB   
 Number of hard drives 1 pc   
 Miscellaneous
 Manufacturer warranty 2 year   
 Release year    
 Links
 Product page http://www.wdc.com/en/products/products.aspx?id=470   
 Manual    
Warranty 0
Price 4,515-Rs 5,499-Rs