I have not had this issue before. I printed something off the SD card, then removed it, put another file on it and put it back in the printer. I can get it to read all of the files that were on the card previously, but not the new ones. It is the card that came with the printer, A 4GB SDHC I have not changed any setting both on the printer and in Cura. I formatted the card, and now all it reads is the "System Volume Information" folder which is empty. I can see the gcode files in windows explorer, so they are being written to the card. Any ideas as to what happened in the hour between starting my last print and trying to start my next one?