emUSB-Host Media Transfer Protocol (MTP), The Media Transfer Protocol (MTP) is a USB class protocol which can be used to transfer files to and from storage devices. The Media Transfer Protocol (MTP) is an extension to the Picture Transfer Protocol (PTP). MTP stands for “Media Transfer Protocol. MTP is a set of custom extensions for Picture Transfer Protocol that is beefed up to allow files and their associated metadata to be transferred. MTP (Media Transfer Protocol) first showed up as default on Android. The Media Transfer Protocol (MTP) is an extension to the Picture Transfer Protocol (PTP) communications protocol that allows media files to be.