I have a Thunderbolt with what should be 2.4GB total of internal memory. I started getting the low memory message and now I cannot even install anything, even after deleting several old apps and moving some to the SD card.

After a little snooping in my phone i found that the mail client is taking up 2.12GB of data. I only have Gmail and an Exchange account on my phone. The gmail is a completely different app, so i know it's not the issue, which leaves the Exchange account in the HTC mail app. I deleted it too, with no change. My phone is basically a brick now and I cannot figure out how to free up that data. I've gone into my outlook and removed all old messages and archived the other stuff so I know i only have 17MB of email in my inbox.

I have no idea what to do....and i really don't want to factory reset it unless absolutely necessary.

 

Thanks to a post HERE I figured out that the phone was storing the massive amount of data in about 7 files in the mail application under this directory /data/data/com.htc.android.mail

I rooted my phone using the Revolutionary app without issue, and I am running the newest OTA (2.11.605.9) Look HERE for instructions.

Then I ran into the problem of not being able to install a file explorer app cause the phone was still acting stupid. So I used the instructions HERE which allowed me to make the device save all new programs to the SD card.

I installed Root Browser Lite from Google Play and was able to navigate to the folder, confirm the files were the issue and remove them. Now I have 2.3GB free and only 304MB used.

Happy Ending. :ciao: