There is a very limited amount of internal memory to install Android applications on, so you should be aware of how much space is available. You should also keep an eye on your SD card memory so that you don’t run out of space for your videos and music.
1. Go to the Home screen.
2. Select the Menu key.
3. Select Settings.
4. Select SD card & phone storage.
5. At the top, under SD card, you will find the Total space and Available space on your SD card. At the bottom, under Internal phone storage, you will see the Available space left for installing your Android applications.