100% authentic with serial 100% health, no bad sectors or get your money back [WD Gold= WD's Flagship HDD] Top of the line, most durable hard drive in Western Digital brand. (Lifetime durability) Up to 10x the workload capacity of desktop drives, WD Gold™ hard drives are designed from the ground up for enterprise-class reliability, capacity, power efficiency and performance. 2,000,000 hours MTBF (up to 4x more than desktop drives, 2x than SSDs) capacity: 2 TB, 4 TB cache: 128 mb form factor: 3.5 inch interface: SATA 6 Gb/s model: WD2005FBYZ, WD4002FYYZ 6 months warranty Datacenter drives: electronic board doesn't deteriorate over the years (compared to consumer HDDs) True-rated power supply recommended Ideal Temp: 40- 60 celsius Tips on lowering temperature: 1) Avoid putting near other components (it restricts airflow) 2) Put fan that directly blows on the hard drive.