Protect your precious files, documents, and memories with OneDrive. You get 1 TB of cloud storage with a Microsoft 365 subscription, and can back up and share your files and photos with friends and family across all your devices. Explore OneDrive support, help, and learning resources.

You might get this message for one of these reasons: There was a problem with OneDrive. Try to upload the file again. The connection to OneDrive was lost during the file transfer, or you weren't signed in to OneDrive. Sign in to OneDrive with your Microsoft account, and then try to upload the file again.

Try it! You can back up your important folders on your PC & Mac (your Desktop, Documents, and Pictures folders) with OneDrive, so they're protected and available on other devices. You can back up a maximum of 5 GB of files in OneDrive for free, up to 1 TB as standard with a Microsoft 365 subscription, or extend that up to 2 TB with add-ons.

Free up drive space in Windows. If your PC is running low on free space, you might not be able to install important Windows updates, and your PC’s performance may be affected. Here are some ways to free up space so you can keep your PC up to date and running smoothly.

If you already have a personal OneDrive account set up, you can only add work or school accounts. Tap Me then Settings. Tap Add account. Learn more about adding a work or school account to OneDrive for Android or OneDrive for iOS.

OneDrive Files On-Demand helps you access all the files in your cloud storage in OneDrive without having to download them and use storage space on your computer. Note: Starting with OneDrive build 23.066 Files On-Demand is enabled by default for all users.

Admins should view Help for OneDrive Admins, the OneDrive Tech Community or contact Microsoft 365 for business support. Resetting Microsoft OneDrive can sometimes resolve sync issues. Follow the steps to reset your OneDrive.

The Microsoft OneDrive icons in desktop notification areas, menu bars, Windows File Explorer and macOS Finder tell you the sync state of the file or folder. If you don't see any desktop notification or menu bar icons, OneDrive may be hidden, not installed or not running. Learn more.

The VLOOKUP and HLOOKUP functions, together with INDEX and MATCH,  are some of the most useful functions in Excel. Note: The Lookup Wizard feature is no longer available in Excel. Here's an example of how to use VLOOKUP. =VLOOKUP (B2,C2:E7,3,TRUE) In this example, B2 is the first argument —an element of data that the function needs to work.

If you need to install or reinstall the OneNote desktop app on Windows (formerly called “OneNote 2016”), do the following: Download OneNote. When finished downloading, double-click the downloaded file to begin Setup.