An information processing device may have an operating system installed therein. The operating system may include a share function for controlling data transfer between a share source application and a share destination application. The information processing device may transfer, to the share destination application via the share function of the installed operating system, property information indicating a property of a particular file identified by the share source application, generate, based on the property information, a unique character string unique to the particular file, and store the unique character string and the particular file in association with each other in a storage unit.