If you are trying to copy Dvd's then you will need a peice of freeware called Dvd shrink, this will ripp the Dvd to your computer organise the file,s and then use your burning software to write them to disc. (this is also good if you only have one burning rom). Really easy to use & each Dvd takes about 90 mins to copy www.doom9.org I think is where I got mine.