For certain paid accounts, your cloud replications will continue uninterrupted even if you exceed your cloud storage limit. However, you will incur an overage charge at the rate of $120/TB/month. In case your usage exceeds your cloud storage quota, you may upgrade to one of the higher storage plans and avoid overage charges. Upgrades may involve additional charges.
IDrive BMR also provides options to configure the cloud retention policy and delete data from the cloud.