There seems to be lots of history about Vista performance issues - particularly around handling large files but all the fixes I've seen seem to have been put right in SP1 which I am using. There's no problem with small files, so it's definitely something to do with the file size that Vista is handling in a different way. This is on an attached USB external hard drive which I have since put back on my XP system to test and it still works fine. and it basically takes minutes to do what XP did in a split second.
I've just migrated from XP to Vista and one issue I can't resolve is why right clicking on large files ( around 20gb - typically hard drive image files ) takes forever - along with a subsequent delete command which then comes up with a dialog box saying it's preparing.
