I have a similar issue with the old ZipCD. I have no idea why Toast doesn't work — I have been wondering that myself. I have heard that deinstalling all of the apple stuff will do something but have not been able to test it myself (I have had the drive for only one day). As for the startup disk full message, discburner creates a full disc image and before it will let you burn. If you do not have about 660 megs free, it won't let you even start. Further, if you don't have the additional space for what you are trying to burn, it will quit shortly after it starts. Hope that helps at least part of your problem. I still couldn't see my drive after turning off discburner, so I think the problem lies with Authoring Support 1.1 making Toast blind to our drives…