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Amazon.com: Western Digital 8TB WD Purple Surveillance Internal Hard Drive HDD - SATA 6 Gb/s, 128 MB Cache, 3.5" & 10TB WD Purple Pro Surveillance Internal Hard Drive HDD - SATA 6
Amazon.com: Western Digital 1TB WD Purple Surveillance Internal Hard Drive HDD - SATA 6 Gb/s, 64 MB Cache, 3.5" - WD10PURZ : Electronics
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Western Digital Blue Internal Hard Drive - 2.5 "- 1TB - SATA 3 - 5400 RPM
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Amazon.com: Western Digital 8TB WD Purple Pro Surveillance Internal Hard Drive HDD - SATA 6 Gb/s, 256 MB Cache, 3.5" - WD8001PURP : Electronics
