The icon showing that One Drive is active is located in the bottom right hand side of the screen.

 

One drive not active

 

One Drive Active (Cloud icon)

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If it is the first time using OneDrive click the Navigation icon on the bottom left of the screen and scroll down until you see Onedrive. Right click and select More then Pin to taskbar

 

 

The following icon will then appear in the task bar

 

 

Open the icon, this will navigate directly to the OneDrive folder