To check the mail quota usage for a particular folder in your mail box, perform the following steps:
Select the folder to check the quota usage and click on the folder properties icon from the mail toolbar.
Alternatively, right-click the folder to check the quota usage and select Folder Properties from the drop-down list of options.
The Folder Properties dialog box appears and displays the folder properties under two tabs: Info and Sharing. The folder properties are available under the Info tab:
Folder Name: Name of the folder selected.
You can change the folder name if you want to, by clicking on the Change button.
Messages: Number of messages in the folder.
Storage Use: Amount of memory usage by the folder. A bar chart indicates the mail quota of the selected folder.
A large shaded portion showing the total amount of quota used by all the folders. The overall mail quota.
A smaller shaded portion indicating the amount of memory used by the selected folder.
A legend is also provided at the bottom of this graph.
Click Close to return to your mail.