It’s unfortunately not uncommon for your Android device to display an “Insufficient Storage Available” message when either downloading a new app from Google Play or installing an update for an existing app:
If you conduct a quick check of available storage on your device, you’ll usually find there is more than enough storage. Your Android phone/tablet can be tempremental about if and when it’ll decide on available storage. There is a simple solution to this problem which involves this app:
Install the App Cache Cleaner app, available in the Google Play store. This app runs in seconds and clears your devices cache of all unnecessary data that may be clogging it up. I’ve run this app numerous times now and never lost any vital information and no existing apps of services have suffered as a result of me using it.
Once you’ve run App Cache Cleaner, have another go at installing/updating the app that was dislaying the insufficent storage notification, it should instal fine this time.