eZee Front desk Configuration >> Advance Settings >> General Settings >> Night Audit/FTP Settings Tab >> Backup Settings >> Database Auto Backup Schedule

How to access:
Please refer below screenshots to delete old database backup files

Note: This action can be only perform on server machine

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Here you can set after how many days you want to delete the previous database backups files

Screenshot 4:
Please enter the username and password of the windows. Refer note as well
Screenshot 5: