A processing apparatus that can accept logs from external processing apparatuses efficiently without degrading the performance of its own. The processing apparatus is connected with a plurality of external processing apparatuses for sending a first log including information on frequency of usage and a second log including information on an error, and collects the first and second logs from the external processing apparatuses. A receiving unit receives the first log sent from each of the external processing apparatuses. A calculation unit calculates a priority of each the external processing apparatuses based on the operating situation of each of the external processing apparatuses determined from the first log received by the receiving unit. A determination unit determines whether or not the second log sent by each of the external processing apparatuses should be stored based on the priority calculated by the calculation unit.