The SanDisk Professional PRO-G40 4TB Thunderbolt 3 Portable External SSD is a high-performance portable hard drive designed for both PC and Mac users. With a read speed of 3000MB/s, this SSD offers fast data transfer rates. The drive is compatible with Thunderbolt 3 and USB-C interfaces, making it versatile for various devices. Its rugged design, including shock resistance and water resistance, ensures durability in tough conditions. With a storage capacity of 4TB, this portable external SSD is a reliable choice for storing and accessing large amounts of data on the go.