OneDrive for Business is an integral part of Office 365 or SharePoint Server, and provides a place in the cloud where you can store, share, and sync your work files. You can update and share your files from any device with OneDrive for Business. You can even work on Office documents with others at the same time.
Microsoft offers another storage service called OneDrive. You may already be using OneDrive to store documents and other content in the cloud. This service is different from OneDrive for Business:
Although you can't connect your personal OneDrive to your Office 365 business account, you can copy or move files between them.
If you’re using Office 365, you get 1 TB of space in the cloud for OneDrive for Business. If your OneDrive for Business library is hosted on a SharePoint server in your organization, your organization’s administrators determine how much storage space is available.
All files that you store in OneDrive for Business are private unless you decide to share them. You can also share files and folders with specified co-workers so you can collaborate on projects. If you’re signed-in to Office 365, you may even be able to share with partners outside of your organization, depending on what your company allows.
To sync OneDrive for Business with your local computer, you'll need the OneDrive for Business sync app which lets you synch your OneDrive for Business files to your computer. This sync app is available with Office 2013 or Office 2016, or with Office 365 subscriptions that include Office 2016 applications. If you don’t have Office, a free download of the OneDrive sync app is also available.
You can also work on your files locally, saving to the OneDrive folder, and your changes will be synchronized automatically with your OneDrive for Business library when you’re online.