Once you run out of storage, most of actions inside the Notewise app will be restricted, such as editing or viewing notes. Also, you'll receive an email from Notewise about your storage usage, anything outside your storage plan will be deleted in the next 7 days. However, once you resolve the storage issue (e.g, by upgrading to a higher storage plan or deleting some notes) within the next 7 days, your data remain untouched!