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 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.
If you are using Wi-Fi, check that you are connected to the strongest network. Weak Wi-Fi can cause your internet connection to run slowly. Learn how to Fix Wi-Fi problems.
Need more help?
Account support. For help with your Microsoft account and subscriptions, visit Account & Billing Help.
Technical support. For technical support, select Contact Microsoft Support below, enter your problem and select Get Help.
Mobile users can contact Support by opening the OneDrive app and gently shaking your device.
Community support. Communities help you ask questions, give feedback, and hear from experts with rich knowledge. Ask the Microsoft Community. Do not disclose personal or sensitive information in public forums.