It appears my message previous to the one before this never got posted so...
*** Update from today ***
- I've now been through all the troubleshooting guides and done the optimization settings. No change.
- I've now hooked up my UMC202HD and installed the latest ASIO driver from their website. Not using the mixer, I'll just use that for gigs.
- Disabled windows from using the Audio Interface for playback and recording.
- Haven't looked to replace the Hitachi drive, but I may do that if I can't get things working any other way.
- I'm currently thinking of buying an Audient ID4 as people seem to rave about it. Do you think it would come with a better quality driver?
- The Hitachi drive is only around half full and it's a 7200rpm so my understanding is that it should be ok, which Darryl also seems to agree with.
So today, with my audio interface connected, along with my headphones, I tried to playback a track again and it seems to have taken a step backwards. I don't get more than 30seconds into a track and it's throws the AAE 9073 error.
I will try and copy the track to my SSD system drive and check that. I'll update once I've tested it.
Thanks as always for the advice folks.