to delete or rename push your finger on the folder name for about two seconds and the option will come up. to see bandwith used goto apps/tools/data counter
You mean the new folders you created? I don't think you can delete them if there stuff in there, try moving them to other folders and then while in organized mode hold on the folder till the pop up menu shows up then you should see the option delete, but the folders need to be empty.
As for the data, well there are some 3rd party apps, I have yet to see one that works great but one thing I can suggest is:
menu-applications-tools-log-data counter then you'll see the sent data and received data but it only hold up worth 30 days. Hope that helps.
your right but for some reason i thought he meant the folders you make on the menu screen, you know.