Backup Files Extensions - What are backup files and how do I open a backup file?

What are backup files and how do I open a backup file?

File Type Category File Format
.001 Backup Files Split Archive File
.002 Backup Files Split Archive Part 2 File
.ab Backup Files Android ADB Backup File
.aba Backup Files Palm Address Book Archive
.abbu Backup Files Address Book Backup
.abf Backup Files Analysis Services Backup File
.abk Backup Files Automatic Backup File
.acp Backup Files Alfresco Content Package
.adi Backup Files Active@ Disk Image Backup File
.arc Backup Files Symbian OS Backup File
.asd Backup Files Word AutoSave File
.ashbak Backup Files Ashampoo Backup Archive
.ba Backup Files Scifer External Header Archive
.backup Backup Files Android Backup File
.bak Backup Files Backup File
.bbb Backup Files BlackBerry Mobile Phone Backup File
.bck Backup Files VMX Backup File
.bk Backup Files FrameMaker Book File
.bkp Backup Files Backup File
.bkup Backup Files Backup File
.blend1 Backup Files Blender Document Backup File
.bup Backup Files DVD IFO Backup File
.cmp Backup Files HotDocs Clause Component File
.dba Backup Files Palm Datebook Backup File
.dbk Backup Files Sony Ericsson Mobile Phone Backup File
.fbk Backup Files Microsoft Dynamics NAV Backup File
.gho Backup Files Norton Ghost Backup File
.icbu Backup Files iCal Backup File
.jdc Backup Files JDownloader Links File
.mbk Backup Files dBASE IV Multiple Index Backup File
.mddata Backup Files iPhone Backup File
.nbf Backup Files Nokia Backup File
.nbu Backup Files Nokia Phone Backup File
.old Backup Files Backup File
.omg Backup Files OpenMG Audio File
.onepkg Backup Files Microsoft OneNote Package File
.orig Backup Files Original File
.pbd Backup Files EaseUS Todo Backup File
.pbf Backup Files Paragon Backup File
.qbmb Backup Files QuickBooks Backup File
.qic Backup Files Windows Backup File
.rbc Backup Files Retrospect Backup Catalog File
.skb Backup Files SketchUp Backup Document
.srr Backup Files ReScene Metadata File
.tbk Backup Files ToolBook File
.tdb Backup Files eBay Turbo Lister Backup File
.tmp Backup Files Temporary File
.uibak Backup Files UltraISO Backup Disk Image
.v2i Backup Files Norton Ghost Virtual Volume Image
.vbk Backup Files VitalSource eBook
.wbcat Backup Files Windows Backup Catalog File