Yes I'm using a Pi-3 and the cables and usb power cables that came with pidrive and the kit. Also currently using the preloaded sdcard. Only other USB peripheral attached is a wireless keyboard & touchpad. Ethernet not connected, but Wi-Fi is. No audio jack.
So I guess my mistake was purchasing the 2A unit as I did not realise it wouldn't work for pi-3. I have the official R-Pi 2.5A unit on it's way to me, probably next week. I will try it out with that.
I'm just a bit worried as I read in other forum threads that even the 3A might be too small to power both the pi & the pidrive.
Thanks for your help and sorry if I came off sounding a bit snarky, but I was a bit frustrated as I have been waiting to get my server up and running and was waiting to get my pidrive to start setting it up.