Files with the .MTA extension contain data used for navigating multimedia files supported by the program that created the given MTA file. The Samsung AllShare platform, which uses automatically generated MTA files to support the process of sharing files online with other devices that support the DLNA standard, sees said MTA files as markers placed in every shared catalog.

When naming the MTA files generated by AllShare, the software adds the extension to the name of the original multimedia file. Samsung AllShare conveniently supports the sharing of films, photos, and music between computers, smart TVs and smartphones.