After purchasing DooDrive Premium Key on DooDrive PayPal Reseller, you will receive a voucher code like this: XXXXXXXXXXXXXXXX, follow this instruction to activate premium:
1. Login to your DooDrive.com account: https://doodrive.com/login
2. Go to the upgrade page: https://doodrive.com/upgrade
3. Scroll down to the "Use Voucher" section.
4. Enter the voucher code provided in the "`ENTER VOUCHER CODE`" field.
5. Click on "Use Voucher Code" button to proceed.