The older and the smaller are flash drives, the more likely it is to have longer retention times. For low-density flash memories, it is possible to achieve up

The older and the smaller are flash drives, the more likely it is to have longer retention times. For low-density flash memories, it is possible to achieve up to 20 years of retention time. This is no longer possible for high-capacity SSDs, which store multiple bits per cell in very small cells.