SanDisk Extreme Pro - USB flash drive - 256 GB - USB 3.1. The SanDisk Extreme PRO USB 3.1 Solid State Flash Drive delivers the super-fast solid state performance in a USB 3.1 flash drive . A game-changer in the USB storage category, flash drive offers read speeds of up to 420MB/s, and write speeds of up to 380MB/s that let you transfer everything fast. With capacities up to 256GB, there's plenty of room to easily manage even massive files. The sophisticated aluminium design is both stylish and durable, and the included SanDisk SecureAccess software , with 128-bit file encryption and password protection, ensures that your private files stay private . Plus, the SanDisk Extreme PRO USB 3.1 Solid State Flash Drive is backed by a limited lifetime warranty for added peace of mind.SanDisk products are constructed to the highest standards and rigorously tested. You can be confident in the outstanding quality, performance and reliability of every SanDisk product.