Download .apk Note #1: your phone needs to be ROOTED to use this application. Note #2: so far, only tested on Droid Incredible. From the built-in help: About this application This application's goal is to help you understand and possibly work around a common vexation of using Android; i.e. these messages: "not enough space" "Low on space. Application data space is low." What is happening? You've checked your phone's vitals and it appears that it has plenty of space left, both internal storage and SD Card storage. So, what's happening? Android allows your applications to store their data, primarily, in a dedicated partition whose size happens to be much smaller than even the phone's internal storage space. Generally south of 150 MBs. This is the partition that fills up so quickly and that Android has been complaining about. And the help goes on and on so I'll stop here. The short version Using this application, you can see which applications use up most of your phone's data space and decide what to do with them. You can also move the biggest directories to the phone's SD Card. Just give it a try and let me know! -Chris.