When you have two computers connected to the internet wirelessly, transferring large files between both the computers over the wireless is very slow.
So the best solution is to connect both the computers with a LAN cable.
However, if you want to transfer files over the LAN, then here are the steps you need to follow.
First, make sure the IP Addresses are set correctly.
Having done that, you can access drives on the other computer using the following path:
\\18.104.22.168\d$ - this is if you want to access the drive on the second computer through the first computer using LAN.
It is also possible to remote desktop into the computer using the same IP. Make sure remote desktop is enabled and that the computer you are trying to remote to has Windows 7 Pro, Ultimate or Business installed. As of now Windows 7 home does not accept remote desktop connection, but it is possible to remote into other computer using a Windows 7 home PC.
If you have any questions, email, firstname.lastname@example.org