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WD Western Digital AV-GP 500GB 32MB Cache SATA 3.0Gb/s 3.5inch (CCTV DVR, PC) Internal Hard Drive (Low power, Quiet) - Walmart.com
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Western Digital Blue, 500GB, Internal, 5400RPM, 2.5 inch (WD5000LPVX) Hard Drive for sale online | eBay
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