I had a family member fit it for me as I was scared and worried that I could end up destroying it, not that it makes any difference now.

It was mounted fine in the caddy. Only thing the screws were not in it as I didnt have the correct ones.

Surely it didnt die because of not having screws in it?

I can only think of the freezing issues with made me switch the box off and on on alot of occasions is the result of how both HDDs have died as I have no other explanation.