I need to delete a folder. I stop the share but in fact this action doesn´t delete a folder. If I create a new share with the same name that the "stopped" share, the new folder contains all the attributes that the old folder (subfolders, permissions, etc).
The point I tried to make at the very beginning is that your question is not clearly stated. Simply by looking at the question, I was pretty sure that you did not understand some of the underlying terminologies and technologies.
1. Taking a CIFS share offline does not delete it.
2. Deleting a CIFS share (which you haven't done) doesn't delete the data, just the CIFS share (a pointer to a directory)
3. Have you actually listened to the suggestion that you create a share pointing to /vol/volStaging? And then try to delete the directory (or as you call it, folder).
I think your life would probably be a lot easier with fewer shares anyway. Your backup/staging script can surely find \\<netapp>\staging\$machine_name instead of \\<netapp>\$machine_name.
The "directories" under /vol/volStaging would probably be more flexible as qtrees. In the end, you aren't going to get the help you need until you ask more specific questions and understand the terms and technology.