1. You will receive a Premium key should look like this: 40eko6ijqsyg34ns

2. Log in to your account: https://fileup.cc/login.html

(If you haven't account, you just need to register free account)

3. Then access "My Account": https://fileup.cc/?op=my_account

4. Put your premium key in field "Apply Premium Key", and click on "Apply"