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Western Digital 250 GB USB 2.0 and FireWire External Hard Drive (WDXF2500JBRNN)

250 GB external hard drive
7200 RPM rotational speed and 8 MB cache for maximum storage performance
Built-in USB 20 hub with two ports for additional drive connections two Firewire ports
Dual-option Backup--automatic or on-demand
Connects to PCs and Macs