The reader is designed with a USB connector and a memory expansion slot that accepts a microSD card. Combine it with a microSD card and you've got the best mobile gear for your phone.This mobile-ready reader eliminates the need to carry additional USB transfer cables and the typical wait for Bluetooth technology slow file transfers between phones and PCs. It also replaces your SD card adapter, since the microSD card fits directly into the reader. When in use, the microSD Card Reader appears as a drive letter (i.e., E:\) and data transfer is as simple as drag and drop. Use the reader with a microSD card to get the storage capacity for a variety of helpful transfers, or acquire content to side load to your phone:Store your entire mobile life - photos, songs, text messages, video clips, personal information - on a microSD card, then work with it across device platforms seamlessly with the microSD Card Reader.