Hi! APR means Annual Percentage Rate. It's the interest rate that your money or crypto is growing.
If you want to withdraw your HBD Savings, just click on the drop down arrow and select Withdraw HBD. It will take 3 days before it's reflected on your account. Take note that currently, only HBD earns at the indicated APR in the Savings and not HIVE.
After your HBD Savings arrive, just follow the guide above on how to sell your HBD in the internal market to get HIVE.