Kentico recommend the following measures to prevent these folders from containing too much data (Preventing Azure cache folders from bloating):
- Configuring the Clean Azure storage cache scheduled task
Refer the below link to get details how to enable Or configure the schedule task and Kentico recommendations -
https://docs.xperience.io/k12sp/deploying-websites/running-kentico-on-microsoft-azure/preventing-azure-cache-folders-from-bloating
Hope it helps you!!