1. pick File Sharing
2. add the folder you want to share with the + button
3. add the users you want to allow sharing with
4. click options button
5. pick FTP checkbox and write down the address shown (ftp://xyz.xyz.xyz.xyz...)
6. click Done
B. In PC: click Start -> Run...
1. enter the address you've written down
Congratulations! Hope this little tutorial helps you transfer files between mac and pc using FTP