The Western Digital WD Caviar 38400 Vintage Hard Drive is an internal desktop drive with a 3.5" form factor. It has a storage capacity of 8.4GB and a rotation speed of 5400 RPM. This untested hard drive from the model AC38400-00RN features an IDE interface, making it suitable for vintage computer systems that use this technology. With the reputable Western Digital brand name, this hard drive offers reliable storage solutions for retro computing enthusiasts and collectors.