SanDisk 128GB Ultra Dual Drive USB Type-C - USB-C, USB 3.1 - SDDDC2-128G-G46,Gray Easily transfer files between smartphones, tablets and computers Free up space on your Android smartphone (Mobile device requires USB Type C port and On The Go (OTG) support) Retractable design with a reversible USB Type C connector and a traditional USB connector High speed USB 3.1 performance of up to 150MB/s Read Speeds (USB Type C port with USB 3.1, Gen. 1/USB 3.0 support required. Based on internal testing; performance may be lower depending upon host device.) SanDisk Memory Zone app for Android (available on Google Play; Download and installation required) lets you easily manage and back up content on your smartphone and tablet 5 year limited manufacturer warranty Easily free up space on your smartphone or quickly transfer files between devices at USB 3.1 high speeds of up to 150MB/s(1). With a reversible USB Type-C connector and a traditional USB connector, the SanDisk Ultra Dual Drive USB Type-C lets you quickly and easily transfer files between smartphones, tablets and computers. Plus the SanDisk Memory Zone app for Android (available on Google Play)(3) helps you manage your device’s memory and your content. The SanDisk Ultra Dual Drive USB Type-C is the perfect liaison between your new USB Type-C device and your devices with traditional USB ports. | 1GB = 1,000,000,000 bytes. Actual user storage less. | (1) 32GB-256GB: Read speeds up to 150MB/s. 16GB: Read speeds up to 130MB/s. Write speeds lower and vary by capacity. USB Type-C port with USB 3.1, Gen. 1/USB 3.0 support required. Based on internal testing; performance may be lower depending upon host device. 1MB=1,000,000 bytes. | (2) Mobile device requires USB Type-C port and On-The-Go (OTG) support | (3) Download and installation required