Tenant Staying Beyond Lease

[Scott Brown]

Lease ended July 31, tenant asked for more time to move so charging him a daily rate.  Still has some a few items in the house and boxes and furniture in garage.  The house is still a mess, didn’t clean at all. At what point can we change the locks and throw stuff in the dumpster  if doesn’t get out before a final deadline this Sunday?  Does the tenant have any rights to retrieve property if he is beyond the lease?  House is in Minnesota.