
OneDrive is your storage space in Office 365. It's like your P drive in the cloud. When you create documents and files using Word, Excel, Powerpoint and OneNote Online, they automatically get saved to OneDrive.
The first time you use Office 365 you need to set up your OneDrive space. It's important to do this first because the Office Online tools won't work properly until you do.
After you've signed in to Office 365, just click on the OneDrive tile. Office 365 will automatically set up your OneDrive space, then display it.