Best way to store sensor data (database, protobuff,...)

Hello

I want to develop an Android app (without a GUI). The app should collect sensor data from a tablet (acceleration, touch input etc.). In addition video from the front cam should be recorded. On top of that I will record raw data from bio-sensors (skin conductance, heart rate etc.) over bluetooth. All this values are just numbers, except for the video recordings.

Now I'm unsure how I should store this data so that I can use it easily later on. I need to store a timestamp, device ID and the data (number or video). If the internal storage of the device gets full I would upload the data to a cloud storage. A possibility would be to use a sql database or something like protobuff (but the video recording could not be stored).

What is the best way to store such data?

— modified on May 19, 2017, 5:17:16 PM