Data storage method and system

A data storage method, applied in a network system of distributed ledger technology, comprising:

• storing, by a first node, data of information units of the network system;
• determining, by a second node, a designated origin signal, wherein the designated origin signal includes an identifier of at least one origin information unit;
• obtaining, by the second node, the date of the information units of the network system from the first node;
• determining, by the second node, a designated destination signal, wherein the designated destination signal includes an identifier of a destination information unit;
• determining, by the second node, a shortest path data from the origin information unit to the destination information unit according to the designated origin signal, the data of the information units of the network system, and the designated destination signal;
• and
• storing, by the second node, data of all information units included in the shortest path data.