File server advice

[wnb]

I am wanting a file server at work, I will have 7 pc's connected via the network and I am all new to servers and know very little about them

I was quoted by a local company to provide one and set it up for me but I was surprised by the price.

A few questions to begin with.

What software do i need? their seems to be several incarnations of ms server and vary in prices so which do i need? (cheaper the better).

Thanks.

 

[wnb]

Centralised file storage, not bothered about email as we acccess that online. The main thing is file storage and document management.