1GB = 1 billion bytes and 1TB = 1 trillion bytes; actual formatted capacity less.
* Trade-in values vary based on the condition, year, and configuration of your trade-in device, and may also vary between online and in-store trade-in. You must be at least 18 years old. In-store trade-in requires presentation of a valid, government-issued photo ID (local law may require saving this information). Additional terms from Apple or Apple’s trade-in partners may apply.