Automatic Save (.sv$) Files
Automatic save files—commonly referred to as "autosave" files—are backup files created automatically by the Autosave feature. Automatic save is enabled by default and the number of minutes between automatic saves can be set in the Open and Save tab in theOptions dialog box or using the SAVETIME system variable. Automatic saves are only done if a drawing has been modified after the last save. QSAVE, SAVE, and SAVEAS will delete the current .sv$ file and halt the automatic save timer until an edit is made to the drawing.