The present disclosure relates to a printer and a method of loading one or more papers into printer tray. In an aspect, the proposed printer can include a printer tray configured to hold a plurality of papers to be used for printing; and a paper sensor configured to sense when number of papers in the printer tray is below a defined threshold, such that when the number of papers in the printer tray is below the defined threshold, the paper sensor issues a notification message to a drone that in turn is configured to, based on the received notification message, pick up and carry one or more papers from a paper storage shelf and load the picked up one or more papers into the printer tray.