| Extension | File Description |
| .MJ1 | Uncommon Files |
| .MJ2 | Video Files |
| .MJ3 | Uncommon Files |
| .MJ4 | Uncommon Files |
| .MJ5 | Uncommon Files |
| .MJ6 | Uncommon Files |
| .MJ7 | Uncommon Files |
| .MJ8 | Uncommon Files |
| .MJ9 | Uncommon Files |
| .MJA | Uncommon Files |
| .MJB | Uncommon Files |
| .MJC | Uncommon Files |
| .MJD | Uncommon Files |
| .MJE | Uncommon Files |
| .MJF | Uncommon Files |
| .MJG | Uncommon Files |
| .MJH | Uncommon Files |
| .MJI | Uncommon Files |
| .MJJ | Uncommon Files |
| .MJK | Uncommon Files |
| .MJL | Uncommon Files |
| .MJM | Uncommon Files |
| .MJN | Uncommon Files |
| .MJO | Uncommon Files |
| .MJP | Video Files |
| .MJP2 | Video Files |
| .MJPEG | Video Files |
| .MJPG | Video Files |
| .MJQ | Uncommon Files |
| .MJR | Uncommon Files |
| .MJS | Uncommon Files |
| .MJT | Uncommon Files |
| .MJU | Uncommon Files |
| .MJV | Uncommon Files |
| .MJW | Uncommon Files |
| .MJX | Uncommon Files |
| .MJY | Uncommon Files |
| .MJZ | Uncommon Files |
| .MK | Developer Files |
| .MK0 | Uncommon Files |
| .MK1 | Uncommon Files |
| .MK2 | Uncommon Files |
| .MK3 | Uncommon Files |
| .MK3D | Video Files |
| .MK4 | Uncommon Files |
| .MK5 | Uncommon Files |
| .MK6 | Uncommon Files |
| .MK7 | Uncommon Files |
| .MK8 | Uncommon Files |
| .MK9 | Uncommon Files |
| .MKA | Audio Files |
| .MKB | Uncommon Files |
| .MKC | Uncommon Files |
| .MKD | Uncommon Files |
| .MKE | Uncommon Files |
| .MKEXT | Uncommon Files |
| .MKF | Uncommon Files |
| .MKG | Uncommon Files |
| .MKH | Uncommon Files |
| .MKI | Uncommon Files |
| .MKJ | Uncommon Files |
| .MKK | Uncommon Files |
| .MKL | Uncommon Files |
| .MKM | Uncommon Files |
| .MKN | Uncommon Files |
| .MKO | Uncommon Files |
| .MKP | Uncommon Files |
| .MKQ | Uncommon Files |
| .MKR | Uncommon Files |
| .MKS | Uncommon Files |
| .MKT | Uncommon Files |
| .MKTS | Uncommon Files |
| .MKU | Uncommon Files |
| .MKV | Video Files |
| .MKW | Uncommon Files |
| Extension | File Description |
| .MKX | Uncommon Files |
| .MKY | Uncommon Files |
| .MKZ | Uncommon Files |
| .ML | Developer Files |
| .ML0 | Uncommon Files |
| .ML1 | Uncommon Files |
| .ML2 | Uncommon Files |
| .ML20 | Uncommon Files |
| .ML256 | Uncommon Files |
| .ML3 | Uncommon Files |
| .ML4 | Uncommon Files |
| .ML5 | Uncommon Files |
| .ML6 | Uncommon Files |
| .ML7 | Uncommon Files |
| .ML8 | Uncommon Files |
| .ML9 | Uncommon Files |
| .MLA | Uncommon Files |
| .MLB | Data Files |
| .MLC | System Files |
| .MLD | Uncommon Files |
| .MLE | Uncommon Files |
| .MLF | Uncommon Files |
| .MLG | Uncommon Files |
| .MLH | Uncommon Files |
| .MLI | Uncommon Files |
| .MLINEFONT | Uncommon Files |
| .MLJ | Uncommon Files |
| .MLK | Settings Files |
| .MLL | Uncommon Files |
| .MLM | Uncommon Files |
| .MLN | Uncommon Files |
| .MLNK | Uncommon Files |
| .MLO | Uncommon Files |
| .MLP | Audio Files |
| .MLQ | Uncommon Files |
| .MLR | Uncommon Files |
| .MLS | Misc Files |
| .MLT | Uncommon Files |
| .MLTV | Uncommon Files |
| .MLU | Uncommon Files |
| .MLV | Uncommon Files |
| .MLW | Uncommon Files |
| .MLX | Uncommon Files |
| .MLY | Uncommon Files |
| .MLYT | Uncommon Files |
| .MLZ | Uncommon Files |
| .ML_ | Uncommon Files |
| .MM | Developer Files |
| .MM0 | Uncommon Files |
| .MM1 | Uncommon Files |
| .MM2 | Uncommon Files |
| .MM3 | Uncommon Files |
| .MM4 | Uncommon Files |
| .MM5 | Uncommon Files |
| .MM6 | Uncommon Files |
| .MM7 | Uncommon Files |
| .MM8 | Uncommon Files |
| .MM9 | Uncommon Files |
| .MMA | Data Files |
| .MMAP | Data Files |
| .MMB | Uncommon Files |
| .MMBK | Uncommon Files |
| .MMBM | Uncommon Files |
| .MMC | Data Files |
| .MMD | Uncommon Files |
| .MME | Encoded Files |
| .MMF | Audio Files |
| .MMG | Uncommon Files |
| .MMH | Uncommon Files |
| .MMI | Uncommon Files |
| .MMJ | Uncommon Files |
| .MMJB_MIME | Uncommon Files |
| .MMK | Uncommon Files |
| .MML | Data Files |
| .MMLD | Uncommon Files |
