Differential Sync could be coming to OneDrive soon. Differential Sync feature, which syncs only the parts of files that have changed, could be making its way to OneDrive soon.
The Tech Summit video of Differential Sync.
The highly anticipated feature would save a lot of bandwidth and time spent updating files shared through OneDrive across multiple devices rather than having to download or upload the entire file all over again.
Microsoft has been teasing at the addition of the Differential Sync feature for about a year now without any clear timeline at when users could expect it, but this addition of it into the roadmap has many users excited.