Western Digital WD4001FYYG 4TB SAS HDD EnterpriseUnleash Enterprise Class Storage Performance Introducing the Western Digital WD Re WD4001FYYG, a 4TB hard drive engineered for demanding datacenter environments. Offering a robust design and unparalleled reliability, this drive is built to handle heavy workloads, ensuring your data is safe and accessible around the clock. Specifications Brand: Western Digital Model: WD4001FYYG Capacity: 4TB Interface: SAS 6Gb s Rotational Speed: 7. 2K RPM Cache: 32MB