Portable Wireless Router - The basic function of this device is used as a portable wireless wifi router; It can turn a wired network to be wifi directly when traveling, it also can be used as a general router and wifi range extender based on 3 different router modes that it supports, Access Point(AP mode), Router Mode and Bridge Mode Filehub Function - Filehub function is a wireless data transmission function; You can connect any storage device to this device, such as an external hard drive, USB flash, SD card, and then you can wirelessly access and transfer files to your external storage device; It will turn your hard drive, USB flash drive and SD card to be a wireless hard drive No Need to Install App - No matter using the function of router or filehub, you can do all the process on a general broser of your phone and computer, so you don't have to install an App to use this Filehub; But it also has an app to provide stabler performance an