Demand for digital data storage is escalating exponentially due to the generation of massive digital data at an unimaginable pace, but the capacity of existing storage medium cannot store them up for long-term. These growing challenges have forced the scientists to look for the other alternatives to store digital data which could not only store data but also archive it for long-term and for eternity. Actually, this challenge has focused growing interests on DNA (Deoxyribonucleic Acid) as attractive alternatives for digital data storage because DNA has incredible capacity for high density data storage, and has efficient density of storage compared to any conventional system and modern storage media. Today, DNA-based data storage is an emerging near-future nonvolatile storage medium which is potentially unprecedented highly-denser, durable, and replication efficient. This storage medium uses synthesizing DNA strings which contain user data and subsequently retrieving the stored data using high-throughput sequencing mechanisms. Therefore, our research paper would closely give the prospects and overviews of DNA-based storage medium as the future supernatural storage for long-term, highly denser and secure digital data storage medium. We would also evaluate some of the system designs to understand the error-correction characteristics of encoding schemes, assess their overheads; and thus, make few projections about future feasibilities based on technology trends carried forward in the past.