The total amount is 165 MB and it's located at /data. This directory is important because the apps you download go into /data/app. Well, I found that you can delete the tombstone files in /data/tombstones. They're basically just log files for crashes. Then you clear the log_files.xml under /data/system/shared_prefs. Is there anything else that can be deleted safely under /data? And how can I increase the partition size without bricking?