Update: Sold out

If you own a NAS (or really any computer that could make use of a 3.5" hard drive), Amazon’s running a stellar deal on WD’s popular 4TB Red hard drive today. Prime members can pick them up for $116 today, which is an all-time low by a whopping $39. I wouldn’t actually be shocked if this was a price mistake, so don’t miss out.

If you aren’t familiar, WD’s Reds are designed specifically for the always-on environment of a NAS, and come with an extended 3-year warranty.