Ok, after much trial and error I seem to have identified the problem and have found a (not perfect) workable solution. In the past, I have often transferrred a few gigs of tracks in one go from My Library to my HD-5 but it appears that Sonicstage 4.3 (or my PC) will not allow me to do this anymore. I worked out that I get the error message when I try to transfer more than around 500 meg of music at a time to my HD-5 and it is this that is the problem. The solution was to transfer less tracks at a time. I am currently transferring one LP at a time as when I get to around 500 meg's worth of data, I still get the error message. At this point, I have no option but to turn my computer off and then on again and carry on until I reach around 500 meg's worth again. It is a very slow and tedious way to do things but at least it works. I'm no expert at computers and therefore do not know why it is doing this and bearing in mind I had no problems until Sonicstage 4.3, then I can only presume that it is this which is causing the problems. But for other people who are gettting the 'Error - can't transfer tracks' problem, it may be worth trying my method and seeing if that works. And if anybody has any idea why I had this problem in the fiorst place, then it would be interesting to know. Good luck.