What's the make/model of your device? You can check what's taking up your storage through your devices settings. You'll see what's taking most of it and what you can delete to free up some. If you're on iPhone go to Settings > General > Storage & iCloud Usage > Manage Storage.
On Android, it should be under Settings>Storage.
Sprint Social Care
You have to go on your phone internet (not google) and go to your bookmarks and clean out your history. Your history take up a lot of space.