I purchased multiple units, but I've decided to use a large-capacity HDD instead, so I'm offering this for sale. It's new, unused, and unopened. SanDisk External SSD Portable Extreme PRO 4TB USB 3.2 Gen2x2 SDSSDE81-4T00-J25 This is a waterproof and shock-resistant portable SSD with a large 4TB capacity and high-speed data transfer via USB 3.2 Gen 2 connection. - Brand: SanDisk - Model Name: Extreme PRO - Capacity: 4TB - Connectivity: USB 3.2 Gen 2