You can use sFTP to upload files, we generally recommend Filezilla or Cyberduck.
You can connect on-campus or using the VPN with the information below.
Pass: NetID Password
Your MySQL credentials are in your home folder (accessible via sFTP) in a directory named accounts.
Store all site content files in the directory named public_html.
phpMyAdmin is accessible at yoursite.uconn.edu/phpmyadmin.