Today only, Newegg offers the Western Digital 4TB Serial ATA 6Gb/s Internal Hard Drive, model no. WD40EFRX, for $154.99. Apply coupon code "CMPAYPAL30" and checkout with Paypal to cut the price to $124.99. With free shipping, that's $9 under last week's mention and the lowest total price we've seen. (It's a current low by $38.) It features a 64MB cache.