The higher the audio quality, the larger the audio files. In order to meet the needs of users of different internet connection, KKBOX now provide the option of setting audio quality depending on your internet environment. This also helps to save mobile data, too! 1. Tap [My Library] → the gear icon to the top right corner of the page → [Playback] → [Audio Quality].2. Choose the audio quality for [Cellular Data] and [Wi-Fi] to your liking.　※If you do not find options higher than 320K, it is possible you have not upgraded to Lossless Quality plan (available only in Singapore, Hong Kong and Taiwan).