Even though these threads contain some older components, I'm really happy to see and get numbers on these Hard Drive return rates by customers...
There's nothing worse than buying drives that fail on you after a year, losing precious obscure and hard to find 1's and 0's you hunted down.
At the bottom of the linked page, there're other pages covering Video Cards and other component return rates.
Hope it serves well. And if anyone has any other links to failure stats from manufacturers, would be very interested.
Components returns rates (5) (page 6: Hard drives) - BeHardware