An alternative to sending large files by email
On WeTransfer.com you add the files you want to send, type the email addresses of the recipients, confirm your sender email, possibly a message and press “transfer”. The files are then sent to WeTransfer’s servers where they will be available to recipients for 7 days.
Account unnecessary if you confirm your email
You don’t need to create an account on WeTransfer. However, without an account, you will need to verify your email address with a 6-digit code you receive by email. If you use WeTransfer frequently, consider creating a free account – you won’t need to verify your email.

Recipients will get an email with a download link
An email with a link to the file is sent to the selected recipients. The large files will therefore not take up space in the recipient’s mailbox. Clicking on the link opens a download page in the user’s browser.

Why is WeTransfer free?
WeTransfer er gratis og finansieres via lidt artsy reklamer der skifter i baggrunden under afsendelse og modtagelse af filer. Så vidt jeg læser deres privacy policy, kan man trygt benytte deres service, men er man nervøs for at ens filer ligger på fremmede servere, kan man jo kryptere dem inden afsendelse, fx med 7-zip.
Of course, WeTransfer also offers a pro version with the ability to send even larger files.