USB On-The-Go, often abbreviated to USB OTG or just OTG, is a specification that allows USB devices, such as tablets or smartphones, to act as a host, allowing other USB devices, such as USB flash drives, digital cameras, mice or keyboards, to be attached to them. Use of USB OTG allows those devices to switch back and forth between the roles of host and device. For instance, a mobile phone may read from removable media as the host device, but present itself as a USB Mass Storage Device when connected to a host computer.
Advance USB Flash drive is indispensible for its convenience and speed, but have traditionally been limited to connecting to hosts such as desktop, laptop, and tablet computers. It allows for connection with smartphones and tablets that support USB On-the-Go. Also connect to standard USB ports, facilitating data transfer between your device and your computer.