Your phone has to be rooted and you have to use a file manager that can use root access. I personaly use es file explorer but be careful deleteing stuff as it can cause problems. I use a app called autostarts to keep stuff from starting first to make sure nothing breaks. Also there is an app I believe it is called droidail apps2sd that can move almost evry app to the sdcard if space is the issue.
Sent from my rooted Cliq2 running Gingerbread by eccentric development