Digital Data Damnation

So, tonight I dumped the contents of my 2GB SD card containing two days shooting to my Epson 2000 - or at least I tried to do so. After about half the card was transferred, I got a disk full message. I checked the space available. Plenty. Pop the card back in the M8 and find that a couple of images are corrupt. Delete them. Try to copy again. Same thing - disk full. Try to copy a few at a time. Some give the same error message. Fortunately, most copy successfully. None of the lost images were very important.
Lesson learned. Use smaller cards and save to the hard drive more often. I have 2 1GB cards with me. I will stick with them for the rest of the trip.
I have used Compact Flash cards for several years with no problem - now I get a failure of an SD card within three weeks. I hope that this is not an omen.