The Seagate IronWolf internal HDD are the ideal solution for up to 8 bay, multi user NAS environments craving powerhouse performance comes with 4TB capacity. This HDD will help you to store more and work faster with a NAS optimized hard drive providing 4TB and cache of up to 64MB. The Purpose built for NAS enclosures, IronWolf delivers less wear and tear, little to no noise/vibration, no lags or down time, increased file sharing performance, and much more. This SATA NAS HDD has 5900RPM, 64MB Buffer, 3.5 Inch form factor, SATA 6.0Gb/s (Built-in) Interface with 180MB/s Transfer Rate. You can easily monitor the health of drives using the integrated IronWolf Health Management system and enjoy long term reliability with 1M hours MTBFThree year limited warranty protection plan included.This IronWolf internal HDD comes with 02 years of limited warranty.