Stop “Redstor Online Backup Plus service controller” service from the windows service controller.
Create a folder which you would like to be the target for the reference data and move the contents of the existing folder to this location.
For example: create folder D:\LocalDB\ and move the contents from C:\ProgramData\Redstor Limited\RedStor Online Backup Plus\storage\AccountName\ to the new folder.
Add a new line to the config.ini under the [General] section. The config.ini file can be found in the application folder C:\Program Files\Redstor Online Backup Plus\config.ini to point the local storage folder at the new location.
Save the change to the file and restart the service.