| Extension |
File Description |
|
Popularity |
| .$$$ | Temporary File | | Average |
| .$db | dBASE Temporary File | | Average |
| .001 | Norton Ghost Disk Backup | | Common |
| .001 | HJSplit Split Archive | | Average |
| .113 | Iomega Backup File | | Average |
| .abbu | Address Book Backup | | Average |
| .abk | Automatic Backup | | Average |
| .acr | Acer eRecovery Management Backup File | | Uncommon |
| .bac | Backup File | | Average |
| .backupdb | Time Machine Backup Folder | | Average |
| .bak | Backup File | | Very Common |
| .bak | Firefox Bookmarks Backup | | Average |
| .bck | VMX Backup File | | Average |
| .bckp | Ad-Aware Quarantined File | | Average |
| .bcm | Microsoft Works Communications Script Backup | | Average |
| .bdb | Microsoft Works Database Backup File | | Average |
| .bkc | Backup4all Backup Catalog | | Average |
| .bkf | Windows Backup Utility File | | Average |
| .bkp | Backup File | | Common |
| .bks | Microsoft Works Spreadsheet Backup File | | Average |
| .bpa | StorageSync Backup Archive | | Average |
| .bpb | PowerDesigner Business Process Backup File | | Uncommon |
| .bpm | PowerDesigner Business Process Model | | Average |
| .bps | Microsoft Works Document Backup | | Average |
| .bup | Backup File | | Very Common |
| .bup | DVD IFO Backup File | | Average |
| .cbk | Backup Configuration File | | Rare |
| .da0 | Windows Registry Backup File | | Uncommon |
| .dbk | dBASE Database Backup | | Average |
| .dov | Temp File | | Rare |
| .fbc | Family Tree Maker for DOS Backup File | | Average |
| .fbf | Free Backup Fix Backup File | | Average |
| .fbk | Microsoft Dynamics NAV Backup File | | Average |
| .fbk | Family Tree Maker for Windows Backup File | | Average |
| .fbu | FEBE Firefox Backup File | | Average |
| .ful | Microsoft Backup File List | | Average |
| .gb1 | Game Maker Backup File | | Average |
| .gho | Norton Ghost Backup File | | Very Common |
| .ghs | Norton Ghost Image Segment | | Average |
| .ipd | BlackBerry Backup File | | Average |
| .iv2i | Norton Ghost Incremental Virtual Volume Image | | Average |
| .jbk | Juno Backup File | | Average |
| .llx | LabVIEW VI Library Backup File | | Average |
| .mem | FoxPro Variable File | | Average |
| .nb7 | NovaBACKUP Output File | | Average |
| .nbf | Backup Now Archive | | Average |
| .nbf | Nokia Backup File | | Average |
| .nbk | NovaBACKUP Backup Script | | Average |
| .nbu | Nokia Phone Backup File | | Average |
| .nco | Nero BackItUp File | | Average |
| .nrs | NovaBACKUP Restore Script | | Average |
| .oeb | Outlook Express Backup Wizard File | | Average |
| .old | Backup File | | Common |
| .ori | Original File | | Very Common |
| .oyx | Approach Alternate Database Index | | Average |
| .paq | Hewlett-Packard Software Restore File | | Average |
| .qbb | QuickBooks Backup File | | Average |
| .qbx | QuickBooks Accountant Transfer File | | Average |
| .qic | Windows Backup File | | Average |
| .qsf | Qualtrics Survey File | | Average |
| .rbc | Retrospect Backup Catalog File | | Average |
| .rbf | Retrospect Backup File | | Average |
| .rbf | Windows Installer Rollback File | | Average |
| .rbk | Windows 95 Registry Backup File | | Average |
| .rbs | Windows Installer Rollback Script | | Average |
| .rdb | Retrospect Backup Set | | Average |
| .rrr | Registry Mechanic Backup File | | Average |
| .sdc | Stardock Central Download Archive | | Uncommon |
| .skb | SketchUp Backup Document | | Average |
| .sn1 | Drive Snapshot First Differential Backup | | Average |
| .sn2 | Drive Snapshot Second Differential Backup | | Average |
| .sna | Drive Snapshot Primary Backup File | | Average |
| .spg | TCP Optimizer Backup File | | Average |
| .sqb | SQL Backup SQL Server Backup File | | Average |
| .tbk | FoxPro Memo Backup | | Average |
| .tmp | Temporary File | | Very Common |
| .uci | UFS Explorer Backup File | | Average |
| .v2i | Norton Ghost Virtual Volume Image | | Average |
| .win | Windows Backup File | | Average |
| .win | FoxPro Window Settings | | Average |
| .xlk | Excel Backup File | | Average |
