This lot includes two 320 GB Western Digital Caviar Blue internal desktop hard drives with SATA II interface. They are compatible with PCs and support HDD drive type(s). These hard drives are perfect for those who need additional storage capacity for their computers.The hard drives have a form factor of 3.5 inches and are model WD3200AAKS. They are in excellent working condition and have been tested to ensure that they function properly. With these hard drives, you can easily store your important files and documents without worrying about running out of space.