About this item Free up space on your Android Phone (Requires device with micro-USB port and On-The-Go (OTG) support. See official SanDisk website for list of compatible devices.) Back up photos, videos, and contacts Retractable design with dual microUSB and USB 3.0 connectors High-speed USB 3.0 performance with up to 150MB/s file transfer from drive to computer (Write speeds lower and varies by capacity. Micro-USB port with USB 3.2 Gen 1 / USB 3.0 support required. Based on internal testing; performance may be lower depending upon host device, interface, usage conditions and other factors. 1MB=1,000,000 bytes.)