Fuji S2 pro, LCD screen flashes up write error.

It could be a faulty memory card. Or maybe dirty contacts on the card itself. Try swapping cards with a friend or your local camera shop and see if it works then. Maked sure the card is correctly inserted too.

If the card formatted in the camera it should be OK. If it was corrupt it would show up during format.
I hope you didn't buy the card off Ebay through an Asian or Chinese dealer. They are conning people with half a gbyte card marked as one gbyte. Some of them are reworked so they show the full Gbyte but when you go to format them they crash when you try to use them.

Anyway it should be under warranty so ask for an exchange or even a different brand.

BMW