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CAD tip CAD tip # 4345:

Question CAD 
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Q - question

What is the difference between .BAK, .SV$ and .AC$ backup files?

A - answer These file types are different backup and temporary files created by AutoCAD.
  • BAK files are backup files created on manual Saves (save commands) in AutoCAD (previous DWG versions)
  • SV$ files are automatic timed backups (autosave) of drawings (deleted on successful AutoCAD exit)
  • AC$ files are temporary AutoCAD working files for various functions (undo, hidden lines...), ac$ files do not contain drawing data

Some AutoCAD functions may also create .TMP files with temporary data (drawings cannot be reconstructed from these files).

100% *  CAD 
12.4.2005    44019×  

See also:
Tip 12592:How to automatically purge old backup files .BAK?
Tip 11479:"Assertion failed" error when launching AutoCAD.
Tip 11170:Be an expert in saving of drawings.
Tip 11145:AutoCAD: Customization file load failed.
Tip 11052:How to add your own chain type to the roller chain generator?

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