WD Travelstar 7K750 HTS727564A9E364 - Hard drive - 640 GB - internal - 2.5" - SATA 3Gb/s - 7200 rpm - buffer: 16 MB - Walmart.com
Used - Very Good: Western Digital Scorpio Blue WD6400BEVT 640GB 5400 RPM 8MB Cache SATA 3.0Gb/s 2.5" Internal Notebook Hard Drive Bare Drive - Newegg.com
Samsung HM641JI/M - 640GB 5.4K RPM SATA 2.5" Hard Drive - CPU Medics
Toshiba 640GB MK6465GSX/N 5400RPM SATA 2.5" Laptop HDD Hard Disk Drive 102646304778 | eBay
Toshiba 640GB Portable Hard Drive (Rocket Red) HDDR640E04XR B&H
WD6400BPVT-60HXZT1 Western Digital SATA 3.0 Gbps 640GB Hard Drive
640 GB SATA Western Digital WD6400AACS-0oz8B1 5400RPM 16MB HDD 3.5 " Hard Drive | eBay
Western Digital Caviar Blue 640GB 7200RPM SATA 16MB 3.5" HDD WD6400AAKS-22A7B2 | eBay
Western Digital WD6400AAKS Caviar Blue 640GB 7200rpm 3.5" SATA Hard Drive TESTED | eBay
Amazon.com: Western Digital Caviar Blue 640 GB Bulk/OEM Hard Drive 3.5 Inch, 16 MB Cache, 7200 RPM SATA II WD6400AAKS : Electronics
Hard Drive Western Digital WD6400AAVS 640GB 7200U/Min 8MB SATA II 3.5'' Inch 633131654929 | eBay
Western Digital Scorpio Blue 640GB 5400 RPM 2.5" HDD - Newegg.com
Amazon.com: Toshiba MK6465GSX - Hard Drive - 640 GB - SATA-300 (CR5609) Category: Internal Hard Drives : Electronics
Western Digital WD6400AAKS-65A7B2 - 640GB 7.2K RPM SATA 3.5" Hard Drive HDD - CPU Medics
Amazon.com: Storite Generic 640 GB 640GB 2.5 Inch Sata Laptop Internal Hard Drive 5400 RPM for Laptop/Mac / PS3 : Electronics
500GB/640GB/750GB 2.5" SATA Internal Hard Drive Disk For PS3/PS4/Pro/Slim Game Console For Sony HDD HD Harddisk 300M/S Silver|Harddisk & Boxs| - AliExpress
Amazon.com: Hitachi 640GB Travelstar 5K750 2.5-inch 9.5mm SATA 2.0 (3.0Gb/s) 5400RPM Hard Drive With 8MB Cache Model HIT0J15372 : Electronics
WD6400AAKS Western Digital Caviar Blue 640GB 7200RPM SATA 3Gbps 16MB Cache 3.5-inch Internal Hard Drive
Western Digital Black 640GB 7200 RPM 3.5" Internal HDD - Newegg.com
Amazon.com: Western Digital Caviar Blue 640 GB Bulk/OEM Hard Drive 3.5 Inch, 16 MB Cache, 7200 RPM SATA II WD6400AAKS : Electronics
New Original Hdd For Hgst 640gb 2.5" Sata 3 Gb/s 8mb 5400rpm 9.5mm For Internal Hard Disk For Notebook Hdd For Hts547564a9e384 - Hard Disk Drive - AliExpress
Cheap Western Digital WD6400BPVT 640GB 5.4K RPM SATA 3GBPS | Refurbished
Western Digital WD6400AAKS-41H2B0 - 640GB 7.2K RPM SATA 3.5'' Hard Drive HDD 640 GB Condition_Used
TOSHIBA (MK6475GSX) 640 GB HDD 2.5" 8 MB 5400 RPM SATA Laptop Hard Disk Drive 5711045541155 | eBay
Cheap Western Digital WD6400AAKS 640GB 7.2K RPM SATA II | Refurbished
