I have several email accounts on the mail.app on my ipod touch. Does it download and save all email and attachments to the ipod, or is it simply fetching info from the web? I was looking at an email and I was able to open and read pdf and word documents as an attachment... are these attachments saved to my iPod and taking up space? Or is it just downloading as a temporary file? If it's a temporary file, does it automatically erase after I turn off wi-fi or when I turn off the iPod? If it's not temporary, how do I go about deleting them to free up space. Thanks!