OneDrive performance and sync speed can be affected by a number of factors, such as syncing a lot of files, syncing very large files, and your internet speed. If you sign in with a work or school account, your Admin may limit your connection speed.
Use Files on Demand. Learn how in Windows 10 or Mac. You can also choose which folders to sync.
Move large files out of OneDrive. Learn how to move PST files.
Most internet connections download faster than they upload, so uploading files can take longer than expected. Check to see if anyone else on your network is using the internet heavily. Consider pausing the sync and wait until later.
Check that you are connected to the strongest Wi-Fi available. Weak Wi-Fi can cause your internet connection to run slowly. Learn how to Fix Wi-Fi problems.
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