# Store

Where collected data values is stored is determined by the option `TSDB Configuration` in the instance configuration settings, as descibed in the section 5. Configuration of the application instance.

A few settings determine weither data values for a variable should be logged (forwarded) into the destination time-series database (TSDB) or not. By default they are all set to enable logging.

- Field `Active` in the `OPC UA Server node settings` dialog window should be checked. This dialog window can be opened by selecting server’s node in the `Address Space` panel and clicking on `Edit` button.

- Setting in the column `Log to TSDB` of the `Logged Variables` table should be checked.

- The option `Collector Agent Enabled` should be turned On for the instance.

- The application should have a valid license for the number of variables collected.

For those variables for which all these conditions met, Industrial Data Collector creates subscriptions and monitored items on OPC UA Servers, and forwards received data changes to the destination TSDB.