Like I said, you may have to do a factory reset on the device. You'd want to back up all your photos/docs/everything else you want to keep, and then there should be a factory reset option in the settings.
Games running in the background can cause issues - that and some games DO take up a lot of storage.
Like I said, you may have to do a factory reset on the device. You'd want to back up all your photos/docs/everything else you want to keep, and then there should be a factory reset option in the settings.