The OWC Mercury Elite Pro Dual 4TB Thunderbolt/USB 3/eSATA with power adapter is an external drive designed for high storage capacity, featuring 4TB of HDD space in a sleek silver color. This model from OWC supports Thunderbolt interface, making it ideal for those looking for fast and efficient data transfer speeds. With both Thunderbolt and USB 3.0 connectivity, this external drive offers flexibility and convenience for users in need of additional storage space. Made in Thailand, this product ensures quality and performance for various computing needs.