The OWC Mercury Elite Pro 2 Bay Enclosure is designed to hold two 3.5 inch hard drives, each with a storage capacity of 750 GB. This dual-drive enclosure from the reputable brand OWC provides fast data transfer speeds and reliable storage solutions for computer systems and networking setups. With the ability to connect multiple drives for increased storage capacity, this enclosure is a versatile and efficient choice for expanding storage options in various computing environments.