| Extension | File Description |
| .FS7 | Uncommon Files |
| .FS8 | Uncommon Files |
| .FS9 | Uncommon Files |
| .FSA | Uncommon Files |
| .FSAC | Uncommon Files |
| .FSB | Plugin Files |
| .FSC | Data Files |
| .FSD | Uncommon Files |
| .FSE | Uncommon Files |
| .FSED | Uncommon Files |
| .FSF | Uncommon Files |
| .FSFIX | Uncommon Files |
| .FSG | Game Files |
| .FSH | 3D Image Files |
| .FSI | Developer Files |
| .FSIF | Data Files |
| .FSJ | Uncommon Files |
| .FSK | Uncommon Files |
| .FSKEY | Uncommon Files |
| .FSL | Developer Files |
| .FSM | Audio Files |
| .FSN | Uncommon Files |
| .FSO | Uncommon Files |
| .FSP | Uncommon Files |
| .FSQ | Uncommon Files |
| .FSR | Uncommon Files |
| .FSS | Data Files |
| .FSSCRIPT | Developer Files |
| .FSSD | Uncommon Files |
| .FST | Game Files |
| .FSU | Uncommon Files |
| .FSV | Uncommon Files |
| .FSW | Uncommon Files |
| .FSX | Developer Files |
| .FSY | Uncommon Files |
| .FSZ | Uncommon Files |
| .FT | Settings Files |
| .FT0 | Uncommon Files |
| .FT1 | Uncommon Files |
| .FT2 | Uncommon Files |
| .FT3 | Uncommon Files |
| .FT4 | Uncommon Files |
| .FT5 | Uncommon Files |
| .FT6 | Uncommon Files |
| .FT7 | Vector Image Files |
| .FT8 | Vector Image Files |
| .FT9 | Vector Image Files |
| .FTA | Uncommon Files |
| .FTB | Uncommon Files |
| .FTBL | Uncommon Files |
| .FTC | Uncommon Files |
| .FTD | Uncommon Files |
| .FTE | Uncommon Files |
| .FTF | Uncommon Files |
| .FTG | System Files |
| .FTH | Uncommon Files |
| .FTI | Uncommon Files |
| .FTJ | Uncommon Files |
| .FTK | Uncommon Files |
| .FTL | Data Files |
| .FTM | Audio Files |
| .FTML | Uncommon Files |
| .FTN | Developer Files |
| .FTO | Uncommon Files |
| .FTP | Uncommon Files |
| .FTQ | Uncommon Files |
| .FTR | Uncommon Files |
| .FTS | System Files |
| .FTT | Uncommon Files |
| .FTU | Uncommon Files |
| .FTV | Uncommon Files |
| .FTW | Data Files |
| .FTX | Uncommon Files |
| .FTXT | Uncommon Files |
| .FTY | Uncommon Files |
| Extension | File Description |
| .FTZ | Uncommon Files |
| .FU | Uncommon Files |
| .FU0 | Uncommon Files |
| .FU1 | Uncommon Files |
| .FU2 | Uncommon Files |
| .FU3 | Uncommon Files |
| .FU4 | Uncommon Files |
| .FU5 | Uncommon Files |
| .FU6 | Uncommon Files |
| .FU7 | Uncommon Files |
| .FU8 | Uncommon Files |
| .FU9 | Uncommon Files |
| .FUA | Uncommon Files |
| .FUB | Uncommon Files |
| .FUC | Uncommon Files |
| .FUD | Uncommon Files |
| .FUE | Uncommon Files |
| .FUF | Uncommon Files |
| .FUG | Uncommon Files |
| .FUH | Uncommon Files |
| .FUI | Uncommon Files |
| .FUJ | Uncommon Files |
| .FUK | Uncommon Files |
| .FUL | Backup Files |
| .FULL | Uncommon Files |
| .FUM | Uncommon Files |
| .FUN | Uncommon Files |
| .FUO | Uncommon Files |
| .FUP | Uncommon Files |
| .FUQ | Uncommon Files |
| .FUR | Uncommon Files |
| .FUS | Uncommon Files |
| .FUSUC | Uncommon Files |
| .FUT | Uncommon Files |
| .FUTHARK | Uncommon Files |
| .FUTHARKG | Uncommon Files |
| .FUTURELAS | Uncommon Files |
| .FUU | Uncommon Files |
| .FUV | Uncommon Files |
| .FUW | Uncommon Files |
| .FUX | Uncommon Files |
| .FUY | Uncommon Files |
| .FUZ | Uncommon Files |
| .FUZZGUITAR | Uncommon Files |
| .FUZZY | Uncommon Files |
| .FV0 | Uncommon Files |
| .FV1 | Uncommon Files |
| .FV2 | Uncommon Files |
| .FV3 | Uncommon Files |
| .FV4 | Uncommon Files |
| .FV5 | Uncommon Files |
| .FV6 | Uncommon Files |
| .FV7 | Uncommon Files |
| .FV8 | Uncommon Files |
| .FV9 | Uncommon Files |
| .FVA | Uncommon Files |
| .FVANIM | Uncommon Files |
| .FVB | Uncommon Files |
| .FVC | Uncommon Files |
| .FVD | Uncommon Files |
| .FVE | Uncommon Files |
| .FVF | Uncommon Files |
| .FVG | Uncommon Files |
| .FVH | Uncommon Files |
| .FVI | Uncommon Files |
| .FVJ | Uncommon Files |
| .FVK | Uncommon Files |
| .FVL | Uncommon Files |
| .FVM | Uncommon Files |
| .FVML | Uncommon Files |
| .FVN | Uncommon Files |
| .FVO | Uncommon Files |
| .FVP | Uncommon Files |
| .FVPL | Uncommon Files |
| .FVQ | Uncommon Files |
