Hi @Jonas Trumpfheller ,
Thanks for your patience. What type of data would you like to store from your web app? you can utilize Azure Blob Storage for your scenario. Azure Blob storage is an object storage solution optimized for storing massive amounts of unstructured data, such as text or binary data. Blob storage is ideal for:
Serving images or documents directly to a browser, including full static websites.
Storing files for distributed access.
Streaming video and audio.
Storing data for backup and restoration, disaster recovery, and archiving.
Storing data for analysis by an on-premises or Azure-hosted service.
you can follow this tutorial to learn how to access Azure Storage for a web app running on Azure App Service by using managed identities.
Hope this helps!
Please let us know if the above helps or you need further assistance on this issue.