Pleasant surprise

At end of Jan I originally bought a WD BLACK SERIES WD4003FZEX 4TB 7200 RPM 64MB Cache SATA 6.0Gb/s 3.5" Internal Hard Drive. It was DOA. WD quickly sent me a replacement. I just noticed today (ok, sometimes I'm slow) that instead ot the WD4003FZEX, they sent me the much more expensive WD4001FAEX.

Big; fast

very slow to wake up

"It is a great thing"

Couldn't be happier with this.

Seems reliable two years on

I've now had this drive for two years and it's my main drive. I've had no problems with it. You will hear a bit of noise from it during heavy use.