You can upgrade from the 'Account tab' in your Frooition account where you can also find details of the pricing for the different hosting levels.
There is a video for this article, to view it now click here.
- Click Image Hosting on the dashboard OR select Account > Summary:
- Click increase hosting size
- Select the new capacity level you require
- Click OK
- Once you have made your selection and clicked OK you will be asked to confirm your selection with this pop-up
Once you have gone through this process your account will be instantly upgraded.
This video will walk you through the above steps and show you how to increase image hosting allocation: