SD memory card will not format in a Samsung Digimax 301.

SD cards have a slide switch along one edge. The position farthest from the metal contacts locks the card, protecting it from writes. The position nearest the contacts unlocks the card.

The Digimax 301 uses SD cards. They should be available at just about any electronics or office-supply store. Make sure you get an SD card 2GB and smaller, and not an SDHC card 4GB and larger.

The Digimax A7 may not be compatible with "High Capacity" SD Cards (SDHC). If this is the case you will need to locate an SD card that is 2GB or less in size as anything larger than this is a high capacity card.

SD card wikipedia page

sadley your sd card has given up the goast time to replace it

Unfortunately, you can't. The D53 works with MMC and SD cards. Your 4GB card is actually an SDHC card. While it fits into the slot, it is electronically incompatible and will not work. Since this is a hardware issue, it is not something that can be changed with a firmware update. You need to use cards 2GB and smaller.

Is the slide switch in the unlocked position?

To rule out a faulty card, format it in the PC using a card reader.

Put the SD in a card reader directly yto the computer

the error message is because the 2gb sd card is not supported (is too big for the camera)
try 1gb sd card and it should be fine

Most SD Memory cards have a little switch on the side to lock them, try switching that to the other position.