First rewritable DNA hard drive stores and edits digital data at molecular level

Researchers at the University of Missouri have developed the first rewritable DNA hard drive, enabling digital data to be stored and edited at the molecular level with unprecedented speed and precision. Unlike traditional DNA data storage—which encodes information in the nucleotide bases (A, C, G, T) but is permanent and cannot be altered once written—this new system allows data to be erased and overwritten repeatedly. This breakthrough transforms DNA from a static archival medium into a dynamic, rewritable storage device, addressing a major limitation of previous DNA storage technologies. The team’s approach maintains DNA’s exceptional advantages, including its ultra-high storage density (theoretically capable of holding all the world’s data in a shoebox), long-term stability, and low energy consumption compared to conventional data centers. Data retrieval involves passing DNA strands through a nanopore sensor that detects electrical signals, which software then converts back into digital files. The researchers aim to miniaturize this technology into a USB-sized device, offering a faster, simpler, and