Local Retention. The local retention process runs at the end of every backup and nightly as part of Datto scheduled operations. You can also force retention to run the process in between backups. When retention runs, specific recovery points get deleted from the chain.

What is the best way to free up local storage space Datto?

Solution to reclaim space

Stop all backups on the Datto device. Go to the web interface of the local device. Under the Configure tab, select Device Settings. Change the Concurrent Backup Setting to 0 so storage can be accessed when space is cleared.

When sizing a Datto device how much space is recommended?

You will need about 30% free space on the backed-up hard drive to allow for optimal backups. The bare minimum is 20% (anything under 30% has the potential to throw errors during the backup process).