Not sure if I understand completely. Why would I want to use it as a file server if I already have a computer. For example, if I need additional space, I can just add some 1 Tb drives on my main desktop, no?
Also, I am intending to hook up an USB external drive to my router which I am going to store all my music and pictures.
Is there any advantage to use it as another file server?
Well, remote storage so you can save room on your PC. But if thats how you feel, retro workstation?