Make your own server:
More detailed Instructions coming soon....
But quickly:
Here's the site I suggest you go to first:
www.wfshome.com (for beginners).
www.sharing-file.com What we are using here. (Intermediate as you have to set up your router's port forwarding).
FTP (More advanced as you have to mess about with usernames and passwords).
You have to pay for the above, but if you search the net you can find a cracked version to trial. Alternatively you can do this from within windows - IIS, but it gets complicated.