| Extension | File Description |
| .MG | Uncommon Files |
| .MG0 | Uncommon Files |
| .MG1 | Uncommon Files |
| .MG2 | Uncommon Files |
| .MG3 | Uncommon Files |
| .MG4 | Uncommon Files |
| .MG5 | Uncommon Files |
| .MG6 | Uncommon Files |
| .MG7 | Uncommon Files |
| .MG8 | Uncommon Files |
| .MG9 | Uncommon Files |
| .MGA | Page Layout Files |
| .MGB | Uncommon Files |
| .MGC | Vector Image Files |
| .MGCF | Uncommon Files |
| .MGD | Uncommon Files |
| .MGE | Uncommon Files |
| .MGF | 3D Image Files |
| .MGG | Uncommon Files |
| .MGH | Uncommon Files |
| .MGI | Uncommon Files |
| .MGJ | Uncommon Files |
| .MGK | Settings Files |
| .MGL | Game Files |
| .MGM | Settings Files |
| .MGMAP | Uncommon Files |
| .MGMF | Vector Image Files |
| .MGN | Uncommon Files |
| .MGO | Uncommon Files |
| .mgp | Uncommon Files |
| .MGQ | Uncommon Files |
| .MGR | Uncommon Files |
| .MGRP | Uncommon Files |
| .MGS | Vector Image Files |
| .MGT | Uncommon Files |
| .MGTPL | Uncommon Files |
| .MGU | Uncommon Files |
| .MGV | Video Files |
| .MGW | Uncommon Files |
| .MGX | Game Files |
| .MGY | Uncommon Files |
| .MGZ | Uncommon Files |
| .MH | Uncommon Files |
| .MH0 | Uncommon Files |
| .MH1 | Uncommon Files |
| .MH2 | Uncommon Files |
| .MH3 | Uncommon Files |
| .MH4 | Uncommon Files |
| .MH5 | Uncommon Files |
| .MH6 | Uncommon Files |
| .MH7 | Uncommon Files |
| .MH8 | Uncommon Files |
| .MH9 | Uncommon Files |
| .MHA | Uncommon Files |
| .MHB | Uncommon Files |
| .MHC | Uncommon Files |
| .MHD | Uncommon Files |
| .MHE | Uncommon Files |
| .MHF | Uncommon Files |
| .MHG | Uncommon Files |
| .MHH | Uncommon Files |
| .MHI | Uncommon Files |
| .MHJ | Uncommon Files |
| .MHK | Uncommon Files |
| .MHL | Uncommon Files |
| .MHM | Uncommon Files |
| .MHN | Uncommon Files |
| .MHO | Uncommon Files |
| .MHP | Data Files |
| .MHQ | Uncommon Files |
| .MHR | Uncommon Files |
| .MHS | Uncommon Files |
| .MHT | Web Files |
| .MHTENX | Uncommon Files |
| .MHTM | Uncommon Files |
| Extension | File Description |
| .MHTML | Web Files |
| .MHTMLENX | Uncommon Files |
| .MHU | Uncommon Files |
| .MHV | Uncommon Files |
| .MHW | Uncommon Files |
| .MHX | Uncommon Files |
| .MHY | Uncommon Files |
| .MHZ | Uncommon Files |
| .MI | Uncommon Files |
| .MI0 | Uncommon Files |
| .MI1 | Uncommon Files |
| .MI2 | Uncommon Files |
| .MI3 | Uncommon Files |
| .MI4 | System Files |
| .MI5 | Uncommon Files |
| .MI6 | Uncommon Files |
| .MI7 | Uncommon Files |
| .MI8 | Uncommon Files |
| .MI9 | Uncommon Files |
| .MIA | Uncommon Files |
| .MIB | Uncommon Files |
| .MIBFONT | Uncommon Files |
| .MIC | Raster Image Files |
| .MICE | Uncommon Files |
| .MID | Audio Files |
| .MIDI | Audio Files |
| .MIDIFILE | Uncommon Files |
| .MIDISYNTH | Uncommon Files |
| .MIDNAM | Uncommon Files |
| .MIE | Data Files |
| .MIF | Page Layout Files |
| .MIFF | Uncommon Files |
| .MIG | Backup Files |
| .MIH | Uncommon Files |
| .MII | Game Files |
| .MIJ | Uncommon Files |
| .MIK | Uncommon Files |
| .MIL | Uncommon Files |
| .MILK | Plugin Files |
| .MIM | Encoded Files |
| .MIME | Encoded Files |
| .MIMG | Uncommon Files |
| .MIN | Uncommon Files |
| .MINDTEASER | Uncommon Files |
| .MINE | Game Files |
| .MINESWEEPE | Game Files |
| .MINGW | Uncommon Files |
| .MINGW32 | Uncommon Files |
| .MINI | Uncommon Files |
| .MINIGSF | Uncommon Files |
| .MINIPSF | Uncommon Files |
| .MINIPSF2 | Uncommon Files |
| .MINIUSF | Audio Files |
| .MINT | Compressed Files |
| .MIO | Executable Files |
| .MIP | Raster Image Files |
| .MIPSEL | Uncommon Files |
| .MIQ | Uncommon Files |
| .MIR | Disk Image Files |
| .MIS | Game Files |
| .MISC | Uncommon Files |
| .MISCTOOL | Uncommon Files |
| .MISS | Uncommon Files |
| .MISTRALLOG | Uncommon Files |
| .MISTY | Uncommon Files |
| .MIT | Uncommon Files |
| .MITSU | Uncommon Files |
| .MIU | Uncommon Files |
| .MIV | Uncommon Files |
| .MIW | Uncommon Files |
| .MIX | Game Files |
| .MIY | Uncommon Files |
| .MIZ | Uncommon Files |
| .MJ | Uncommon Files |
| .MJ0 | Uncommon Files |
