By default, Polarbackup supports backing up PST files while they are open. To add more file extensions to the list of the files you wish Polarbackup to back them up even if they are open, please do the following:
- Open your Polarbackup desktop software.
- Click on the Settings option.
- Refer to the Advanced Settings.
- In the input box of the VSS Extensions, type the extensions of the files you wish Polarbackup to back them up even if they are open.