The Seagate IronWolf 4TB ST4000VN008 NAS 3.5" SATA HDD is a reliable and high-capacity internal desktop drive specifically designed for NAS systems. With a rotation speed of 5900 RPM and a cache size of 64MB, this green hard disk drive offers fast read speeds of up to 500MB/s and a transfer rate of 300 Mbps. The drive is compatible with PCs and comes with a manufacturer warranty of 1 year, making it a dependable choice for storing and accessing large amounts of data. The IronWolf product line from Seagate ensures a combination of performance and durability for all your storage needs.