| Extension | File Description |
| .XFQ | Uncommon Files |
| .XFR | Data Files |
| .XFS | Audio Files |
| .XFT | Font Files |
| .XFU | Uncommon Files |
| .XFV | Uncommon Files |
| .XFW | Uncommon Files |
| .XFX | Uncommon Files |
| .XFY | Uncommon Files |
| .XFZ | Uncommon Files |
| .XG | Uncommon Files |
| .XG0 | Uncommon Files |
| .XG1 | Uncommon Files |
| .XG2 | Uncommon Files |
| .XG3 | Uncommon Files |
| .XG4 | Uncommon Files |
| .XG5 | Uncommon Files |
| .XG6 | Uncommon Files |
| .XG7 | Uncommon Files |
| .XG8 | Uncommon Files |
| .XG9 | Uncommon Files |
| .XGA | Uncommon Files |
| .XGB | Uncommon Files |
| .XGC | Uncommon Files |
| .XGD | Uncommon Files |
| .XGE | Uncommon Files |
| .XGF | Uncommon Files |
| .XGG | Uncommon Files |
| .XGH | Uncommon Files |
| .XGI | Uncommon Files |
| .XGJ | Uncommon Files |
| .XGK | Uncommon Files |
| .XGL | Uncommon Files |
| .XGM | Uncommon Files |
| .XGN | Uncommon Files |
| .XGO | Uncommon Files |
| .XGP | Data Files |
| .XGQ | Uncommon Files |
| .XGR | Uncommon Files |
| .XGS | Settings Files |
| .XGT | Uncommon Files |
| .XGU | Uncommon Files |
| .XGV | Uncommon Files |
| .XGW | Uncommon Files |
| .XGX | Uncommon Files |
| .XGY | Uncommon Files |
| .XGZ | Uncommon Files |
| .XH0 | Uncommon Files |
| .XH1 | Uncommon Files |
| .XH2 | Uncommon Files |
| .XH3 | Uncommon Files |
| .XH4 | Uncommon Files |
| .XH5 | Uncommon Files |
| .XH6 | Uncommon Files |
| .XH7 | Uncommon Files |
| .XH8 | Uncommon Files |
| .XH9 | Uncommon Files |
| .XHA | Uncommon Files |
| .XHB | Uncommon Files |
| .XHC | Uncommon Files |
| .XHD | Uncommon Files |
| .XHDML | Uncommon Files |
| .XHE | Uncommon Files |
| .XHESSIAN | Uncommon Files |
| .XHF | Uncommon Files |
| .XHG | Uncommon Files |
| .XHH | Uncommon Files |
| .XHI | Uncommon Files |
| .XHJ | Uncommon Files |
| .XHK | Uncommon Files |
| .XHL | Uncommon Files |
| .XHM | Uncommon Files |
| .XHN | Uncommon Files |
| .XHO | Uncommon Files |
| .XHP | Uncommon Files |
| Extension | File Description |
| .XHQ | Uncommon Files |
| .XHR | Uncommon Files |
| .XHS | Uncommon Files |
| .XHT | Web Files |
| .XHTM | Web Files |
| .XHTML | Web Files |
| .XHU | Uncommon Files |
| .XHV | Uncommon Files |
| .XHVML | Data Files |
| .XHW | Uncommon Files |
| .XHX | Uncommon Files |
| .XHY | Uncommon Files |
| .XHZ | Uncommon Files |
| .XI | Audio Files |
| .XI0 | Uncommon Files |
| .XI1 | Uncommon Files |
| .XI2 | Uncommon Files |
| .XI3 | Uncommon Files |
| .XI4 | Uncommon Files |
| .XI5 | Uncommon Files |
| .XI6 | Uncommon Files |
| .XI7 | Uncommon Files |
| .XI8 | Uncommon Files |
| .XI9 | Uncommon Files |
| .XIA | Uncommon Files |
| .XIB | Developer Files |
| .XIC | Uncommon Files |
| .XID | Uncommon Files |
| .XIE | Uncommon Files |
| .XIF | Page Layout Files |
| .XIG | Uncommon Files |
| .XIH | Uncommon Files |
| .XII | Uncommon Files |
| .XIJ | Uncommon Files |
| .XIK | Uncommon Files |
| .XIL | Uncommon Files |
| .XIM | Uncommon Files |
| .XIN | Uncommon Files |
| .XIO | Uncommon Files |
| .XIP | Uncommon Files |
| .XIQ | Uncommon Files |
| .XIR | Uncommon Files |
| .XIS | Uncommon Files |
| .XISE | CAD Files |
| .XIT | Uncommon Files |
| .XIU | Uncommon Files |
| .XIV | Uncommon Files |
| .XIW | Uncommon Files |
| .XIX | Uncommon Files |
| .XIY | Uncommon Files |
| .XIZ | Uncommon Files |
| .XJ0 | Uncommon Files |
| .XJ1 | Uncommon Files |
| .XJ2 | Uncommon Files |
| .XJ3 | Uncommon Files |
| .XJ4 | Uncommon Files |
| .XJ5 | Uncommon Files |
| .XJ6 | Uncommon Files |
| .XJ7 | Uncommon Files |
| .XJ8 | Uncommon Files |
| .XJ9 | Uncommon Files |
| .XJA | Uncommon Files |
| .XJB | Uncommon Files |
| .XJC | Uncommon Files |
| .XJD | Uncommon Files |
| .XJE | Uncommon Files |
| .XJF | Uncommon Files |
| .XJG | Uncommon Files |
| .XJH | Uncommon Files |
| .XJI | Uncommon Files |
| .XJJ | Uncommon Files |
| .XJK | Uncommon Files |
| .XJL | Uncommon Files |
| .XJM | Uncommon Files |
| .XJN | Uncommon Files |
