It can be written once, readable forever

SanDisk has introduced a memory card that can be written to once but retains stored data forever.

SanDisk has introduced a 1GB SD card based on WORM technology.

The essence of the technique is that it can be written to the data carrier once, which data cannot be modified or deleted later. It is designed to keep important documents safe at room temperature for the next 100 years. Of course, this can be utilized primarily by state bodies and companies, and these are also the primary target audience.

Source: gizmodo.com