Method for wearable device to work as net disk of mobile phone to protect users private data

A mobile device, comprising:

• a wireless network communication interface for communication over a wireless network;
• a processor coupled to the wireless network communication interface;
• a memory accessible to the processor;
• and
• programming in the memory, wherein execution of the programming by the processor configures the mobile device to perform functions, including functions to:
• pair the mobile device with a first wearable device of a plurality of wearable devices via the wireless network;
• receive first private user data from the first wearable device via the wireless network, wherein the mobile device does not store the first private user data in volatile or non-volatile storage before receiving the first private user data from the first wearable device;
• store the first private user data received from the first wearable device only in volatile storage on the mobile device;
• in response to a first user input on the mobile device that changes the first private user data, modify the first private user data in the volatile storage, the first modified private user data including the first private user data received from the first wearable device and the changes from the first user input on the mobile device;
• synchronize the first private user data on the mobile device with the first wearable device by sending the first modified private user data or a portion thereof to the first wearable device;
• and
• in response to generation of a deletion command, release the first modified private user data.