One of my resolution for the new year is to setup a NAS (Network Attached Storage) at home so all my data can be backup in a centralized location with easy access.  I would also recommend making multiple copies of your data on different disks in case of disk failure.  I started my research over the Christmas break and that is when I came across SS4200E on buy.com for $135.

Here is the spec:
?Storage Capacity: Expandable to 4.0 TB (4 1-TB drives)
Disk Drives: 4 Serial ATA (SATA)
Hard Disk Drives Supported: 3.5 inch SATA 1.5 Gb/s and SATA 3.0 Gb/s
Processor: A single Low Voltage Intel® Celeron® M 420 processor operating @ 1.6 GHz
Memory Capacity: 1 GB maximum, using 32-bit DDR2 SDRAM System ships with 512MB DDR2 SDRAM memory
DIMM Slots One 240-pin DIMM socket
SATA Compliance SATA 3.0Gb/s
Client Connectivity Client Connectivity via Gigabit Ethernet
Connectivity 2 USB 2.0 ports

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