Skydrive Pro is according to official documentation on office.microsoft.com something that can be used for
- Your personal library which a part of Office 365, SharePoint Online which has 25 GB storage.
- The application that syncs documents of SharePoint Online to your local drive and makes them available offline.
In this tip we’re going to cover the second, the application.
Whenever you see this sync button you can choose to sync these documents
You’ll find your synchronized files in your File Explorer, under Favorites. If you’re syncing an Office 365 SkyDrive Pro library, your synchronized files appear in the SkyDrive@<organization> folder. Work on them locally if you like and your changes will be synchronized automatically with your SkyDrive Pro library when you’re online.
You can also start the wizard from the SkyDrive Pro menu in your Windows notification area. Select the SkyDrive Pro icon and then select Sync a new library.
Specify the address you want to sync.
- You can sync up to 5,000 items in site libraries, including folders and files.
- In any library, you can download files up to 2 GB.