System File Type – bak

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System File Type

bak

Database
Windows Explorer icon for the bak file type in OneDrive folders

Overview

A SQL Server backup file, commonly using the .bak suffix.

Characteristics

Binary backup media written by SQL Server and potentially containing full, differential, or log backup sets.

Common Uses

Database recovery, migration, disaster recovery, and point-in-time restore workflows.

Compatible Programs

  • SQL Server Management Studio
  • SQL Server
  • dbatools
  • sqlcmd

Sources

bak Available by Year Taken/Created

bak — Live from Microsoft

Secure, read-only view focused directly on the bak file-type folder.