Once you have a wallet, you'll need to add Arweave tokens (AR) to your wallet. ArDrive is based on the Arweave network and the digital currency AR is used to pay the global network of operators who maintain the permaweb.
Remember, ArDrive only requires a one time fee. There are no ongoing subscription fees for storage, and never will be.
Here are a few ways that you can obtain AR to pay for your permanent data: