Set an Alert for Low Disk Space in Tableau Cloud and Server Sites

This feature is not currently built into the Tableau Cloud or Tableau Server Product. 

Workaround for Tableau Server:

Tableau  server administrators can use the Server Disk Space administrative view to see current disk space usage, then create an Email Alert with a Monitoring Script.

Workaround for Tableau Cloud:
Use Admin Insights data source to create custom views, then create data-driven alerts to notify running out of storage.

Steps:
1. Create a custom view, search "size" for the measures [Size of Data Sources (MB)] and [Size of Workbooks (MB)], then plot the sum-up into the viz

2. Create an alert for when the storage usage goes above a threshold. For the limit of storage capacity see Tableau Cloud Site Capacity.