How to activate UploadBox Premium Key:

1. You will receive a UploadBox premium key like this: 898vcltnskoiiuw

2. You should be log in : https://uploadbox.io/login.html

( If you haven't account at UploadBox, you just need to sign up: https://uploadbox.io/register.html )

3. Make sure you are logged in. Then access this link: https://uploadbox.io/?op=my_account

4. Put your voucher code in field "Apply Premium Key", and click on "Apply"