1. You should be log in : https://hot4share.com/login.html ( If you haven't account at hot4share.com, you just need to sign up: https://hot4share.com/register.html ) 
2. Make sure you are logged in. Then access this link: https://hot4share.com/?op=my_account
3. Put your voucher code in field "Apply Premium Key", and click on "Apply"

What is Hot4Share?

Hot4Share is a file hosting provider. We offer online storage/remote backup capacity, sophisticated uploading and downloading tools.
With Hot4Share you can host files, images, videos, audio and flash on the same place.
 

Why should I use Hot4Share?

Whenever you need to send a file that is too large for e-mail, Hot4Share can help. If you need secure remote storage capacity for off-site backups, Hot4Share offers solutions for you. If you want to access personal data from a variety of computers and don't want to carry around a USB stick, Hot4Share is a perfect way of doing so.