SanDisk Ultra - USB flash drive - 256 GB - USB 3.2 Gen 1. Designed with our planet in mind, the SanDisk Ultra Eco flash drive is made with over 70% recycled plastic, such as disposable water bottles. This saves over 50% CO2 emissions, fresh water, and energy during the manufacturing process. And, with capacities up to 512GB and time-saving transfer speeds up to 100MB/s, you can quickly store more of what matters most.