In the Flyp App, select "Flyp Funds", then "Transfer from another bank", and follow the prompts to connect with the external bank. Once connected, enter the amount you want transferred and select "send". The minimum amount you can transfer from an external bank is $20.
Another way to transfer money from another bank is to log into the external bank account, and initiate a transfer from that bank. You will need your Flyp routing number and account number to do so, which is located in the "Flyp Money" section under "My Card".