This (Ver 1.4) is a major upgrade, and upgrades the Android system as well as DataPilot, the cameras, and craft. Connect the ST16S to the internet before you start, and be sure the Update Pilot App is installed (from Play Store).
Have both batteries fully charged, and be patient, the process, which includes connecting to Yuneec servers, is lengthy. During upgrade if internet connection is lost, start over.
H520 updates for ST16S, craft, and all 3 cameras. Take care not to confuse camera update files.
To download... Go HERE .