To rename the file, click the file name in the title bar, for example Document, and then type a name.All changes are automatically saved in the Office online apps, so when you go back to OneDrive, your new file is already saved.
Create a file in an Office desktop app
Open a desktop app, like a Word, Excel , or PowerPoint.
Select File > Save As.
Select your OneDrive – Personal account.
Type a name for the file and select Save.
Create folders
Select New > Folder.
Type a name for the folder and select Create.
Select the files you want and drag them into the folder.