Microsoft OneDrive lets you backup files, photos, videos, and music.Thomas Trutschel/Photothek via Getty ImagesMicrosoft OneDrive is a cloud storage service that lets you backup, sync, or share your files.Microsoft OneDrive comes with a Microsoft 365 subscription, but there is also a free version.You can use OneDrive on devices like computers, laptops, tablets, phones, and even Xboxes.OneDrive is Microsoft's cloud-based online storage solution.Most OneDrive users get access as a part of a Microsoft 365 subscription, which includes Microsoft Office and 1TB of OneDrive storage space.