I had a Lexar 512 die on me between MLA and ATL. It was a disaster. I tried everything. Tech Support at Lexar was useless.

I wish I could give you repair advice. Now I travel with my other Lexar 1GB AND a zip disk as back up.

Also, I use a Gmail account as a back up where I email mission critical files before traveling. Gmail stores 1 Gig for free.