Optiarc 7170a problem

Hi…after having the initial problem of not being able to write to the drive (which I overcame thanks to another thread), I’ve now written a DVD with some music files (as data), but when I try to navigate the disc and open the files, its really really REALLY slow.

I’ve tried it with a disc that a friend leant me (ie it was written on his computer), but for the discs that I write they’re all really slow…to the point of it being painful.

If anyone has any ideas what might be wrong, I’d massively appreciate your input…although please bare in mind that I don’t have a clue about computer hardware so leyman’s terms may be necessary.