Files in the Recycle Bin and Second Stage Recycle Bin make up your allocated storage space and as such if your OneDrive is almost full or has no space left you may need to empty your Recycle Bin.

To do this, open OneDrive from your Airhead Launchpad.

Click Recycle Bin from the option on the left, where you will see deleted items listed, you can then click Empty recycle bin.

You can then scroll to the bottom of the page and click Second-stage recycle bin. Here you will see previously deleted items listed, you can click Empty recycle bin again.

Warning: after following this step you will not be able to recover these files. Please make absolutely sure they are no longer needed.