Can I Connect a Drive to My Router & Create a NAS?

Episode 1758
Chuck fromChuck wants to know if he can connect a USB drive to his router. Leo says the router has to support it. It's not really "plug and play." And if it does support it, it may be pretty slow. But it can be accessed from any computer on the network, so it's kinda like a cheap NAS. If the router is open-source compatible, then Leo recommends going with DD-WRT or Tomato for the firmware. They have NAS features that could be most helpful.