On Jelly Bean, using FX with root, I noticed duplicate files in /data/app-asec/, e.g.:

  • com.disney.WMW-1.asec (56,9 MB)
  • com.disney.WMW-2.asec (56,9 MB)

It looks like one is obsolete and consuming almost 60MB.

So I deleted the older ones of the duplicates and also renamed all files to have the suffix -1.

After a reboot, some apps were not working. The launcher showed a "app is not installed" message.

After some more research, I found the file /data/system/packages.xml which contains lines like these:

{% highlight xml %} {% endhighlight %} So I changed these lines to read `com.disney.WMW-1` and after one more reboot, all apps worked again. AND I had **500MB more free space**.