managing their content. Other operating systems Later versions of several operating systems, including AmigaOS, Android, AROS, MorphOS, and Symbian OS support MTP, sometimes with additional drivers or software. A disadvantage of MTP devices on Android as compared to USB mass storage is that although file timestamps are preserved when copying files from the Android device to one's computer, when copying in the other direction, the file modification timestamps are replaced with the time the copy was done. Other manufacturers Companies, including Creative Technology, Intel, iriver, and Samsung Electronics, that manufacture devices based on Microsoft's "Portable Media Center specification", have widely adopted MTP. Supporting devices were introduced at the 2004 Consumer Electronics Show. After an initial period of uncertain reactions, several large media player producers such as Creative Technology and iriver adopted the MTP protocol in place of their own protocols. Many devices and audio software applications support MTP. Alternatives USB Mass Storage Network-attached storage (NAS) See also Windows Media IEEE 1394 (firewire) References External links MTP 1.1 specification MTP What, Why, How. (Android feature) ArchLinux Wiki: Media Transfer Protocol Microsoft application programming interfaces Microsoft Windows multimedia technology USB