This hard drive from Toshiba has room for 4,000 GB of data. This model has a 3.5" form factor.
From Senetic
HDD Toshiba S300 (SMR) HDWT840UZSVA 4TB 3,5' 5400 256MB SATA III Surveillance BULK
Priceless Computing
Toshiba 4TB S300 Surveillance HDD Bulk
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