A NERS-active structure is disclosed that includes at least one heterostructure nanowire. A dent having a circular horizontal cross-sectional shape is formed at a central portion surrounded by the at least two elastic contact pieces. The server performs either an internal retry or forwards a no-file response from the storage system to the client computer in response to receiving a no-file file status from the storage system depending on an amount of elapsed time from the time the server initially receives the file storage request.