A cybersecurity system includes a controller that functions as a gateway between an end user device and an offline data storage device. When the end user device wants to access a file on the offline data storage device the controller severs a connection between a temporary storage memory and the end user device, establishes a connection with the offline data storage device, pulls the data from the offline data storage device to a temporary storage memory, then severs the connection with the offline data storage device, then establishes the connection with the end user device and communicates the data from the temporary storage memory to the end user device before overwriting the data in the temporary storage memory.