YSK: The USB port on a lot of modern routers let you connect your external hard drive to it. It will then always be accessible through your network. It will basically appear as a regular drive on your computer once configured.
from /r/YouShouldKnow
YSK：很多现代路由器上的USB端口可以让你把你的外部硬盘连接到它上面。然后，它将始终可以通过你的网络访问。一旦配置好，它基本上会作为一个普通的驱动器出现在你的电脑上。