We are maintaining a SharePoint Online site with several custom add-ins(apps). We need to be able to backup the data stored in the SharePoint Online lists of the add-ins.
We have considered recommended third-party solutions such as Metalogix, CloudAlly and AvePoint, but none of these provide functionality for backing up add-in data.
A last resort would be to write our own backup application using the SharePoint Online API. This however is a solution inconvenient to maintain, because when changes are done to the data-structure of the add-ins, changes also need to be done in the backup application.
Do anyone have a suggestion for a good solution to this?