I often work with rather large PowerPoint files (embedded videos, etc), and am having a really irritating problem with files that I have synced with OneDrive. Every time I save these large files, Office first saves a local copy, then proceeds to give an "Uploading to OneDrive" message at the bottom of the screen. If I continue working with the file, all is OK. But if I want to close PowerPoint, it takes *forever* for PowerPoint to finish uploading and close. Why is this behavior necessary? If I am working with a file saved to Dropbox, I don't get this problem. I simply save and close the file, and then Dropbox does its thing in the background. Is there no way to tell Office not to upload to OneDrive and only to save local copies until the program is closed?