Media Transfer Protocol (MTP) common files libmtp is a library for communicating with MTP aware devices in POSIX compliant operating systems. It implements MTP Basic, the subset proposed for standardization. The Media Transfer Protocol (commonly referred to as MTP) is a devised set of custom extensions to support the transfer of music files on USB digital audio players and movie files on USB portable media players. This package provides the udev rules file and the FreeDesktop.org Device Information Files file (used by HAL).