SanDisk SDDDC2-128G-I35 128 GB OTG Drive??(Silver, Black, Type A to Type C). Designed specifically for next-generation devices with the new USB Type-C port. The reversible connector has a symmetric design, so that it?s always right-side up, making it easy and fast to plug in. High-speed USB 3.1 performance of up to 150MB/s means you spend less time waiting to transfer your photos, videos, songs, and other files between devices. With dual connectors, the SanDisk Ultra Dual Drive USB Type-C lets you free up space on your smartphone or tablet, or transfer files between multiple devices, whether it has a USB Type-C port or the traditional USB Type-A port. Available from the Google Play store, the SanDisk Memory Zone app. lets you view, access, and back up all the files from your phone's memory in one location. It can also automatically move files from your device to your drive to free up space. The SanDisk Ultra Dual Drive USB Type-C is backward-compatible, so you can plug it into any USB 3.0 or 2.0 port. The amount of capacity you need depends on the types of files you have, how big they are, and how many there are. The chart above gives you an idea of how many photos, videos, music and office files you can store for each capacity.