Re: This has been available for a while
The 4TB WD easydrive has been around for over a year now (I know; I bought a couple during a Cyber Monday sale and bought two more this year--for $20 less each than before). Having said that, these may not be 1TB/platter models, but in this case does it really matter?
And yes, Seagate and I have had bad experiences as well. I only use the ones I picked up for temporary storage these days since I've had most of them start to cut out on occasion.