Thank you for your quick reply.
I should have mentioned that I had already successfully tested the card size functionality. I was hoping there was a simple library function call to get the amount of free space on the card...
Another, very kludgy workaround, would be to take the total card size and loop through all of the stored files subtracting their current size from the total size. That would give an indication of how much size is left. That's definitely NOT what I am looking for... especially, as I think of it, as it would have to recurse through folders and subfolders as well!
Thanks...