Storage Memory Low

[Brutus3200]

I have an HTC Touch Pro 2 from sprint. I am now getting storage memory critcally low. I cant text or send emails anymore. It says I have 90KB of 289 MB. I have talked to people from sprint for over 3 hours and they couldnt figure it out. I belive my phone is downloading every email i read. I cant seem to find where they are in file explorer thru phone or computer. Every time I go to hit something the error comes up. I have done what some have said for the HTC Diamond and nothing works. I cant figure out what else would be making the phone be out of memory. Please help. if anyone knows how to clear all old emails stored on phone? Or if its something else thats taking up 200+ meg? I am using an email from road runner thru outlook, if that helps. My friend had the palm pre and had the same problem, but somehow found the folder with all the emails and freed up 80% of the storage. I dont snap many pictures, or even use internet much. I mainly use the phone for talking and email. Thanks Mike