Save in Office 365 for business
Upload files to OneDrive for Business
Sign in to Office.com/signin.
Choose OneDrive in the Office Online app launcher .
Can't find the app you're looking for? From the app launcher, select All apps to see an alphabetical list of the Office 365 apps available to you. From there, you can search for a specific app.
Choose Upload. Choose Files or Folders.
Choose Files or Folders.
Or drag and drop files onto the window.