Along with storage space, if data security is your major concern then SharePoint Security Sync is the app you need. A preferred app on Microsoft AppSource, SharePoint Security Sync is a comprehensive solution that integrates Dynamics 365 CRM with SharePoint and provides secure access to confidential documents stored in SharePoint. Sync Dynamics 365 CRM and SharePoint security privileges to diminish security risk while storing documents/attachments in SharePoint. Restrict user’s level of access in SharePoint to the same level that is assigned to them in Dynamics 365 CRM. Furthermore, replicate any changes made to Dynamics 365 CRM security privileges in SharePoint.