Step 1: Make or buy an Ethernet cross-over cable
You must make an Ethernet cross-over cable. It's quite easy to make. Google if you don't know how to make one.
Step 2: Connect the two computers with this cable.
It doesn't matter which end of the cross-over Ethernet cable goes into which PC.
Step 3: Configure IPv4 settings
One one computer (let's call it Computer A), go to control panel -> network and internet -> network connection and you should see all the network connections you have. Usually you have an Ethernet connection and a wireless connection, depending on your computer's network cards. Right click on the Ethernet connection and select properties. You should see a window. Select the properties of TCP/IPv4. Change IP settings to the following:
IP: 192.168.88.1
network mask: 255.255.255.0
default gateway: 192.168.88.3
Leave DNS addresses empty.
network mask: 255.255.255.0
default gateway: 192.168.88.3
Leave DNS addresses empty.
Click OK. Therefore, Computer A's IP is 192.168.88.1.
In the other computer (let's call it Computer B), change IP settings to the following:
IP: 192.168.88.2
network mask: 255.255.255.0
default gateway: 192.168.88.3
Leave DNS addresses empty.
network mask: 255.255.255.0
default gateway: 192.168.88.3
Leave DNS addresses empty.
Click OK. Therefore, Computer B's IP is 192.168.88.2.
Your default gateway can be something else, but it must be the same on both computers.
Step 4: Share your folder(s)
Let's suppose you want to transfer E:/photos/myPhoto.jpg from Computer A to Computer B. On Computer A navigate to E: and right click on photos directory and select Properties. Go to the Share tab and click on Advanced Sharing... button.
You should see a window titled "Advanced Sharing". Tick the checkbox "Share this folder". Click on Access Right button and tick the checkbox "Modify" under Everyone's Access Right. Click OK.
Now the folder E:/photos should be shareable between Computer A and Computer B.
Step 5: Log into one computer from the other computer
Let's suppose you want to transfer E:/photos/myPhoto.jpg from Computer A to Computer B. On Computer B, open a File Explorer and type the following in the address field:
\\192.168.88.1
You should see a prompt asking you to enter username and password. Enter the username and password of Computer A. Once you are done you should see Computer A's E:/photos folder. You can go into the folder and copy the file myPhoto.jpg to a local folder.
If Computer A belongs to a domain that Computer B does not belong to, you must enter Computer A's domain in the username field. How do you find the domain? Go to control panel -> user accounts -> manage user accounts, and you'll see all the accounts listed in the user account window. The column "Domain" shows the domain name.
Suppose the domain is JET-OPTO, and your username is michael, then you enter the following in the username text field:
JET-OPTO\michael
Questions? Let me know!