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Amazon.com: Western Digital 8TB WD Purple Surveillance Internal Hard Drive HDD - SATA 6 Gb/s, 256 MB Cache, 3.5" - WD82PURZ : Electronics
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WD Purple 8TB 10TB 12TB PRO 3.5" Surveillance HDD SATA 6 Gb/s 7200RPM 256MB Monitoring Hard Drive for Video Recorder NVR - AliExpress
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