You can remove tags for the folders for which you no longer want to monitor the trend.
From the navigation pane, go to Data Insights.
The Data Insights page appears.
Under Risk Analysis, click File storage optimization.
The File storage optimization page appears.
In the Dashboard section, click Trending data.
The Dashboards page appears.
Click Remove trend.
In the Select Folders step, select a data source.
In the Folder Information section, select the folders.
In the Preview step, review the selected folders.
Click Remove Trend.