Microsoft Office 2013 lets you upload files directly to web severs, but before doing so Office 2013 first saves that file locally to its Office Document Cache. This means that you can save changes and immediately continue working even when you are offline or have a bad network connection. Microsoft Office Upload Center provides a way to see the status every file you upload, from a single window. It also lets you keep track of how uploads are progressing, and whether any files need your attention. Changing the cache settings can be useful when you are working on projects hosted directly on a server or you don’t otherwise have an updated local copy of the file saved.
To change the cache settings, search for “upload center” in the Start Menu of Windows 7 or 8. Open up the Office 2013 Upload Center program.
In the Upload Center click the Settings button.
Under cache settings adjust the number of days to keep files in the Office Document Cache. Setting a low number will free up system space, however setting a higher number will help you avoid losing documents and data in the case of an upload failure or server error.
You can also manually delete all cached files or set them to automatically delete after each document is closed.
Note: Checking the “Delete files from the Office Document Cache when they are closed setting” setting will react with different behavior if you close a file before an upload finishes. You will be given the option to save the file to another location, wait for it to fully upload, or exit without saving changes. There is no way to force documents to remain pending for upload.