The usage of small and low-cost sensor nodes with the ability of sensing differentkinds of physical and ecological conditions and wireless communication is the unique feature of Wireless Sensor Networks (WSN). A number of sensing abilitiesof WSN are used inseveral number of application areas. However, the distinctiveness of WSNnecessitates more efficient methods for data promoting replika väska and processing.As a result, novel techniques for data routing have become an active area for research as the energy available for sensors is limited. In order to improve the overall performance of WSN, it is necessary to distribute the energy dissipated throughout the WSN. Moreover, that data storage has become an active area of research in WSN as the gathered data required to be stored for future information retrieval. This paper concentrates on analyzing the existing techniques of WSN for data storage and energy efficiency in sensor nodes.