Symptoms
In your backup location, you notice archives with "Remediation" in their names.
Cause
Archives with names like "%device_name%-Remediation" are created as a result of backup remediation action performed by user from Threat Feed (in case, the user confirmed to Backup of protected or unprotected machines in the Run recommended actions section on a received alert).
These archives can be deleted manually in the Backup storage tab if required.