1. Please login into your InterFiles account first: http://interfile.net/?op=login
( If you don't have an account, please register a new account )
2. Premium key / Premium coupon can be used here once you are logged in into your account:
http://interfile.net/?op=my_account
3. Paste your Premium key / Premium coupon in "Premium Coupon:" and click "Apply" to proceed.
