Microsoft just announced the preview release of Azure File Sync. This is going to be of great interest to a lot of folks that have large, cramped file shares.
Read the announcement here: https://azure.microsoft.com/en-us/blog/announcing-the-public-preview-for-azure-file-sync/
Pay close attention to this aspect of the new service:
“The real magic of Azure File Sync is the ability to tier files between your on-premises file server and Azure Files. This enables you to keep only the newest and most recently accessed files locally without sacrificing the ability to see and access the entire namespace through seamless cloud recall. With Azure File Sync, you can effectively transform your Windows File Server into an on-premises tier of Azure Files.”