When you install the OneDrive desktop app for Windows, a copy of your OneDrive is downloaded to your PC and put in the OneDrive folder. This folder is kept in sync with OneDrive. If you add, change, or delete a file or folder on the OneDrive website, the file or folder is added, changed, or deleted in your OneDrive folder and vice versa.
To upload files to OneDrive automatically, just copy or move the files to your OneDrive folder using File Explorer, or save them in your OneDrive folder from a program. Files you upload this way can be up to 2 GB in size. If you installed the OneDrive app on other computers, the files will automatically be added to the OneDrive folders on them, too.
You can also use File Explorer to rename and delete files, create new folders, and move files around in your OneDrive folder. The changes will automatically be made in OneDrive and your other computers that have the OneDrive app installed.
To rotate photos in OneDrive, open the photos in your OneDrive folder and rotate them in a simple photo viewer such as Windows Photo Viewer. When you close the files, your changes will be saved and the photos will be automatically updated in OneDrive.
If you use a lot of storage space in OneDrive, it might take a long time to download all your files when you first install the OneDrive app. For tips on maximizing the transfer speed, see Maximize upload and download speed.