WeTransfer is about as easy as online file transfers get. Just go to the site, upload a file (or multiple files) up to 2GB, enter your email address and that of the person you want to receive the file (you can email up to 20 people), include a message if you like, and hit “Transfer”. The other person will receive an email with a download button, and you will receive a confirmation that the file was sent. What’s more, you will receive a follow-up email when the other person successfully downloads the file. No usernames or passwords to remember, and the files stay available for two weeks.