| Extension | File Description |
| .M3Y | Uncommon Files |
| .M3Z | Uncommon Files |
| .m4 | Developer Files |
| .M40 | Uncommon Files |
| .M41 | Uncommon Files |
| .M42 | Uncommon Files |
| .M43 | Uncommon Files |
| .M44 | Uncommon Files |
| .M45 | Uncommon Files |
| .M46 | Uncommon Files |
| .M47 | Uncommon Files |
| .M48 | Uncommon Files |
| .M49 | Uncommon Files |
| .M4A | Audio Files |
| .M4B | Audio Files |
| .M4C | Uncommon Files |
| .M4D | Uncommon Files |
| .M4E | Uncommon Files |
| .M4F | Uncommon Files |
| .M4G | Uncommon Files |
| .M4H | Uncommon Files |
| .M4I | Uncommon Files |
| .M4J | Uncommon Files |
| .M4K | Uncommon Files |
| .M4L | Uncommon Files |
| .M4M | Uncommon Files |
| .M4N | Uncommon Files |
| .M4O | Uncommon Files |
| .M4P | Audio Files |
| .M4Q | Uncommon Files |
| .M4R | Audio Files |
| .M4S | Uncommon Files |
| .M4T | Uncommon Files |
| .M4U | Video Files |
| .M4V | Video Files |
| .M4W | Uncommon Files |
| .M4X | Uncommon Files |
| .M4Y | Uncommon Files |
| .M4Z | Uncommon Files |
| .M50 | Uncommon Files |
| .M51 | Uncommon Files |
| .M52 | Uncommon Files |
| .M53 | Uncommon Files |
| .M54 | Uncommon Files |
| .M55 | Uncommon Files |
| .M56 | Uncommon Files |
| .M57 | Uncommon Files |
| .M58 | Uncommon Files |
| .M59 | Uncommon Files |
| .M5A | Uncommon Files |
| .M5B | Uncommon Files |
| .M5C | Uncommon Files |
| .M5D | Uncommon Files |
| .M5E | Uncommon Files |
| .M5F | Uncommon Files |
| .M5G | Uncommon Files |
| .M5H | Uncommon Files |
| .M5I | Uncommon Files |
| .M5J | Uncommon Files |
| .M5K | Uncommon Files |
| .M5L | Uncommon Files |
| .M5M | Uncommon Files |
| .M5N | Uncommon Files |
| .M5O | Uncommon Files |
| .M5P | Uncommon Files |
| .M5Q | Uncommon Files |
| .M5R | Uncommon Files |
| .M5S | Uncommon Files |
| .M5T | Uncommon Files |
| .M5U | Uncommon Files |
| .M5V | Uncommon Files |
| .M5W | Uncommon Files |
| .M5X | Uncommon Files |
| .M5Y | Uncommon Files |
| .M5Z | Uncommon Files |
| Extension | File Description |
| .M60 | Uncommon Files |
| .M61 | Uncommon Files |
| .M62 | Uncommon Files |
| .M63 | Uncommon Files |
| .M64 | Uncommon Files |
| .M65 | Uncommon Files |
| .M66 | Uncommon Files |
| .M67 | Uncommon Files |
| .M68 | Uncommon Files |
| .M69 | Uncommon Files |
| .M6A | Uncommon Files |
| .M6B | Uncommon Files |
| .M6C | Uncommon Files |
| .M6D | Uncommon Files |
| .M6E | Uncommon Files |
| .M6F | Uncommon Files |
| .M6G | Uncommon Files |
| .M6H | Uncommon Files |
| .M6I | Uncommon Files |
| .M6J | Uncommon Files |
| .M6K | Uncommon Files |
| .M6L | Uncommon Files |
| .M6M | Uncommon Files |
| .M6N | Uncommon Files |
| .M6O | Uncommon Files |
| .M6P | Uncommon Files |
| .M6Q | Uncommon Files |
| .M6R | Uncommon Files |
| .M6S | Uncommon Files |
| .M6T | Uncommon Files |
| .M6U | Uncommon Files |
| .M6V | Uncommon Files |
| .M6W | Uncommon Files |
| .M6X | Uncommon Files |
| .M6Y | Uncommon Files |
| .M6Z | Uncommon Files |
| .M7 | Uncommon Files |
| .M70 | Uncommon Files |
| .M71 | Uncommon Files |
| .M72 | Uncommon Files |
| .M73 | Uncommon Files |
| .M74 | Uncommon Files |
| .M75 | Video Files |
| .M76 | Uncommon Files |
| .M77 | Uncommon Files |
| .M78 | Uncommon Files |
| .M79 | Uncommon Files |
| .M7A | Uncommon Files |
| .M7B | Uncommon Files |
| .M7C | Uncommon Files |
| .M7D | Uncommon Files |
| .M7E | Uncommon Files |
| .M7F | Uncommon Files |
| .M7G | Uncommon Files |
| .M7H | Uncommon Files |
| .M7I | Uncommon Files |
| .M7J | Uncommon Files |
| .M7K | Uncommon Files |
| .M7L | Uncommon Files |
| .M7M | Uncommon Files |
| .M7N | Uncommon Files |
| .M7O | Uncommon Files |
| .M7P | Uncommon Files |
| .M7Q | Uncommon Files |
| .M7R | Uncommon Files |
| .M7S | Uncommon Files |
| .M7T | Uncommon Files |
| .M7U | Uncommon Files |
| .M7V | Uncommon Files |
| .M7W | Uncommon Files |
| .M7X | Uncommon Files |
| .M7Y | Uncommon Files |
| .M7Z | Uncommon Files |
| .M8 | Uncommon Files |
| .M80 | Uncommon Files |
