Consider the following scenario:
You browse to a OneDrive for Business library.
You click the gear icon, and then you click either Site Contents or Site Settings.
On the Site Contents or Site Settings page for the OneDrive for Business site, you examine the Microsoft Office 365 top navigation bar.
In this scenario, the Office 365 top navigation bar displays either Sites or Newsfeed. However, you expect it to display OneDrive.
NOTE: This issue doesn't affect the top navigation bar for the OneDrive for Business library.
This behavior is expected. A Sites or Newsfeed link is displayed in the Office 365 top bar navigation based on your Enterprise Social Collaboration settings.
To set the Enterprise Social Collaboration feature, follow these steps:
Sign in to the Office 365 portal.
Click the Admin tile, click SharePoint, and then click settings.
View the Enterprise Social Collaboration section.
If you select Use Yammer.com service, the top navigation bar displays Sites on some OneDrive for Business pages. This occurs even if you change the setting to Use SharePoint Newsfeed (default).
If you select Use SharePoint Newsfeed (default), and if you have never set the Use Yammer.com service option, the top navigation bar displays Newsfeed on some OneDrive for Business pages.
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