Abstract: Method, device, and system for transferring data from one portable media player to another. Small, portable devices that store and play back text, music, video, and/or other types of media have proliferated. Transferring data between such devices is often inconvenient, however, because it typically requires connecting both devices to a personal computer. Embodiments of the invention provide methods, devices, and systems for copying data from one media player to another without the use of a personal computer. Such embodiments may comprise, for example, a portable device commensurate in size to a media player or smaller. Such a portable device may be connected to a source media player and a target media player and may copy some or all files from the source to the target. In some embodiments of the invention, the user can select specific files for copying.