Many people overlook the USB port on a router, but it can serve several useful purposes beyond just connecting peripherals. One common use is turning an external hard drive or solid-state drive (SSSD) into a networked storage device. By connecting the drive to the router’s USB port and enabling the appropriate settings—often found under options like "File Sharing," "USB Storage Device," or "ReadySHARE"—users can access files from any device connected to the network. This is typically done through protocols like SMB (Server Message Block), Samba, or FTP (File Transfer Protocol), depending on the router model. Another practical use of the USB port is sharing a printer across the network. By connecting a printer to the router, users can print wirelessly from any device connected to the network. However, this functionality depends on both the router and printer being compatible. Some setups may require installing specific software, such as Asus' EZ Printer Sharing app, to ensure proper operation. Some advanced routers support connecting cellular dongles via the USB port, which can act as a backup or primary internet connection. This feature, known as dual WAN or multi-WAN, allows for automatic switching between internet sources if one fails. Additionally, modern routers can share an Android phone’s internet connection through USB tethering. However, this method does not automatically switch to the phone's connection if the main internet source fails. Despite its versatility, the USB port has some limitations. Older router models may only support USB 2.0, which is slower for transferring large files. Additionally, some portable hard drives require an external power source due to higher energy needs. For more reliable storage, a dedicated network-attached storage (NAS) device is often recommended, as it offers better performance and features like RAID, which helps protect data by storing it across multiple drives. While the USB port can be useful for file sharing and media access, it's generally not recommended for storing critical data due to potential instability.