human
What is the best way to make sure I don't lose any data after upgrading to Windows 10?
assistant
The best way to make sure you don't lose any data after upgrading to Windows 10 is to back up your files before you upgrade. You can use a backup program or cloud storage service such as Dropbox, Google Drive, and OneDrive to ensure that all of your important documents are safe in case something goes wrong during the upgrade process.