I have two RT-AC68U routers, one of which is my broadband router, while the other is sitting unplugged in a closet. (The latter's broadband port was killed by a lightning strike, and while I eventually figured out how to repurpose another port for broadband, I'd since purchased a replacement, which BTW is a different version with a significantly faster UI. Except for the broadband port, the damaged router works fine.) I'd like to use the idle one to make a wireless file server. I can use either USB attached storage or connect it to a PC, and I'd like the option to do both. I have no experience with either so would appreciate some guidance. I know nothing about AIMesh, access points, etc.