Hello @DebR75 ,
We always separate contacts that are unsubscribed from you, from your main lists. These contacts are never counted toward your active contacts for Billing purposes. You're free to delete the contacts if you wish to do so, but we'll still maintain their unsubscribed status for your account. If you accidentally re-upload them while they're still unsubscribed from you, then your system will automatically catch them and shift them back into the unsubscribed folder only.