You have a confirmation number, you have a room in your name, you paid a deposit. that's a confirmed reservation. You get all the privileges of someone staying on property! That includes booking your dining reservations and fastpasses all at once at 180 days and 60 days, respectively, before your trip. You also get free parking at all theme park lots. You'll get magic bands for no additional cost.
The $200 deposit means you paid for a vacation package, the final amount is due 30 days before you check in.