Good Afternoon Experts

I am trying to create what in my head should be a pretty straightforward report in the form of a pie chart, but I'm unable to generate it!

I have a table which contains records based on disk drive usage by clientID. The clientID is also used as a parameter to select the disk drives.

The relevant fields are: Size which contains the actual size of each drive, Free which contains the actual free size of the drive and Used which is a percentage of the drive used.

I want to be able to present a Pie Chart which shows the free space as a percentage of the size of the drive but show the actual size and free numbers as the labels, not the percentages.

If this can be acheived then any advice would be more than useful!!

Thanks in advance

Steve