| fsthumb | Wondershare Filmora Thumbnail Cache |
| fstrm | Frame Streams Protocol Data |
| fsw | Random FlashBackup Flash Data |
| fsxml | FreeSWITCH XML Data |
| fsz | Fractal Zplot Data |
| ft | EdgeCAM Feature Template |
| fta | OpenFTA File |
| ftbl | PIPE-FLO Fluid Data Table |
| ftch | Extensis Portfolio Image Database |
| ftes | Autodesk Inventor Stress Analysis Test Data |
| ftf | Xperia X10 Phone FTF Firmware |
| fth | FileMaker Pro Theme |
| ftk | Forensic Toolkit Data |
| ftmb | Family Tree Maker Backup Data |
| ftploc | Mac OS X Finder FTP Location Data |
| ftpquota | Pure-FTPd Quota Data |
| ftr | CONDOR Flight Track |
| ftr | NimbleGen Feature Report Data |
| ftv | CleverPath Forest and Trees View File |
| ftw | FontTwister Saved Text Effect |
| ftz | fastText Quantized Model |
| fuc | Frequently Used Commands |
| fud | FairUse Wizard Data File |
| ful | Microsoft Backup File List |
| fun_list | Free Uninstaller Data |
| furl | Fact200 URL Data |
| fus | FXpansion Uninstall Script |
| fuse | Adobe Fuse 3D Model |
| futr | NetIQ Identity Manager Future-dated Infotype Cache |
| fv | Fresh View Thumbnail Cache |
