Recently, I burned a DVD disc and verified the compilation successfully, but later couldn't find a file on it. Since the occupied space was greater than the combined size of all the files I found on the disc, I opened IsoBuster. I found that the disc had three file systems, ISO, Joliet and UDF (normal, with green icon) and that the file really was on the disc, but it, and the folder it was in, was not appearing in the UDF File system, even though it was listed in ISO and Joliet, and I was able to extract it to my hard drive without any problems. Last night, a similar thing happened with a CD,