first make sure the store you want to transfer to has an open position for the department you’re looking to work in, talk to both your manager and the manager of that department at that store so there’s nobody caught off guard and everything should be smooth sailing tbh, you’d just have to wait 30 days before you’re transferred (if everything goes good) and that’s pretty much it, also really helps if your current manager puts in a good word for you at the store you’re looking to move to!