Re: save to sd card
Welcome to Android Central! Not all devices allow you to set the SD card as a default save location. If you don't see a setting like that in your system settings, then the phone doesn't have the option. You could check the Camera settings to see if the Camera app allows it. Open Camera, tap the menu or settings icon, and look through its settings for a default storage location option.
You don't save apps directly to the SD card--they still have to download and install into Internal Storage first. Then, if the phone gives you the option, you can try moving a portion of the app to the SD card. Go to Settings>Apps, select the app, and look for a "Move to SD" button. If you don't see that button with any app, then the phone doesn't allow it. If the phone does allow it, be aware that not all apps can be moved.