AutoCAD also auto-saves every 10 minutes (by default). These are .sv$ files. If AutoCAD crashes and never saved a .bak , search your temp folder ( %TEMP% ) for files ending in .sv$ . Rename them to .dwg .
This guide applies to Autodesk AutoCAD 2010 through 2025 and beyond. While third-party CAD software (like DraftSight or BricsCAD) also uses .bak files, the rename method works universally. Always maintain multiple backups of mission-critical engineering data. .bak to .dwg
Converting a .bak file to a .dwg file is one of the oldest, simplest, and most effective recovery methods in the CAD world. Yet, many younger users don’t even know what a BAK file is. AutoCAD also auto-saves every 10 minutes (by default)
She copies the .bak , pastes it, and renames the copy to Bridge_Deck_Rev04_RECOVERED.dwg . Rename them to