A few days ago I announced support for resumable upload to OneDrive for Business in OneSync app. I ended the blog post with

With this limitation removed OneSync now works very well with both OneDrive flavors.

Well, not true. There is a subtle issue in OneDrive for Business API implementation which breaks resumable download. Download works but it’s not “resumable”. If a network error occurs and breaks ongoing download, at the next attempt OneSync restarts from the very beginning of the file. Poor testing on my side.

This issue has been fixed. Please go to Google Play and update the app.