USB drive offers the ultimate in speed. The dual-channel USB 3.0 interface offers faster data transfer speeds versus single-channel USB 3.0, making it easy to transfer multiple files at once or larger files without error. The retractable design keeps the connector and data protected without the worry of losing a cap. Connector/Port/Interface: USB 3.0; Storage Capacity: 256 GB; Writing Speed: 80 MBps; Reading Speed: 175 MBps.