You can protect data on a PCMCIA memory card from being accidentally deleted by enabling the write-protect mode. As soon as you enable the write-protect mode on a PCMCIA memory card, you are no longer able to copy any data until you disable the write-protect mode.
Using a fine-tipped tool (such as a screwdriver), slide the write-protect switch toward the edge of the PCMCIA memory card, as shown in Figure G-1 to enable the write-protect mode.