HD camcorder files saved as .MTS How do I save them in a format that will play on my computer?
When I upload my HD camcorder files they are saved as .mts and are not playable and I don't know how to convert them or save them in a compatible format in the first place.
There is no mts converter software from Microsoft however you may use
your favorite search engine and download any third party converter to convert .mts to some other format.
Note: Using
Third Party Software, including hardware drivers can cause serious problems that may prevent your computer from booting properly. Microsoft cannot guarantee that any problems resulting from the use of Third Party Software can be solved. Using Third Party Software
is at your own risk.
Refer:
Convert music, videos, and pictures from one format to another