How can I transfer from one bank account to another for free?

I finally got me a new apartment I can afford since I started pulling in a lot of overtime. But they dont accept discover cards and thats what capital one uses. I dont want to leave my bank because I have 3 credit cards and a savings account through capital one. I want to have autopsy setup because I rely on autopsy for all my bills. So of transferring isnt a free option what do yall advise?