The Vintage Retro WD Caviar AC26400-00RT p/n: AC26400-00RTT1 6.4GB hard drive by Western Digital is a HDD designed for use with PCs. With a cache of 512KB and a rotation speed of 5400 RPM, this IDE interface drive offers reliable storage for various computing needs. Perfect for those looking to add a piece of retro technology to their collection or for use in older systems that require a specific HDD type.