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Amazon.com: Western Digital AV-GP WD5000AVDS 500GB 32MB Cache 5400RPM SATA II 3.0Gb/s 3.5 Internal Hard Drive (CCTV DVR, PC, Mac) (Renewed) : Electronics
Amazon.com: HGST Travelstar 2.5-Inch 500GB 5400RPM SATA II 8 MB Cache Internal Hard Drive (0J11561) : Electronics
Amazon.com: Toshiba 500GB 2.5-inch SATA Laptop Hard Drive (5400rpm, 8MB Cache) MQ01ABD050 : Electronics
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Amazon.com: WD Blue 500GB Mobile Hard Disk Drive - 5400 RPM SATA 6 Gb/s 7.0 MM 2.5 Inch - WD5000LPVX : Electronics
Amazon.com: Storite Generic 3.5 Inch SATA Internal Hard Drive (500GB) : Electronics
Amazon.com: MaxDigitalData 500GB 8MB Cache 5900PM SATA 6.0Gb/s 3.5" Internal Surveillance CCTV DVR Hard Drive (MD500GSA859DVR) - w/ 2 Year Warranty : Electronics
Amazon.com: WD Blue 500GB Mobile Hard Disk Drive - 5400 RPM SATA 6 Gb/s 7.0 MM 2.5 Inch - WD5000LPVX : Electronics