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Toshiba X300 Performance and Gaming 4TB 7200 RPM SATA III 6Gb/s 3.5" Internal CMR Hard Drive - Micro Center
Toshiba MG03SCA400 4TB 7.2K 64MB Cache SAS 6Gb/s 3.5" Hard Drive. Dell OEM - ServerSupply.com
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TOSHIBA MD04ACA400 4TB 7200 RPM 128MB Cache SATA 6.0Gb/s 3.5" Internal Hard Drive Desktop Internal Hard Drives - Newegg.com
Toshiba MG03SCA400 4TB 7200 RPM 64MB Cache SAS 6Gb/s 3.5" Internal Hard Drive | eBay