SOLLUTION: had the very same problem, error 13:01 on my sony dsc p50 after formating the stick in my pc. Sollution for all these things is to reformat the chip. YOU DONT NEED A SPECIAL PROGRAM. My camera unfortunately has no firmware with a format option, so i tried the Windows ones to let this thing run. And it worked after these MAGIC WORDS: format y: /FS:FAT /A:8192 the y: is the driveletter for the chip in your pc and the important word is /A:8192 -- means that the clustersize on the chip has to be 8kB. The standart format in windows is using 512b clusters on a chip with these sizes.