Last year, Dropbox talked about making a shift to Shingled Magnetic Recording or SMR disks for short because of the efficiency they can give a high volume storage platform like theirs. Today, Western Digital announced that Dropbox was one of the first companies to qualify their Ultrastar® DC HC650 20TB, host-managed SMR hard disks. Dropbox’s modern infrastructure story goes back to 2017 when it decided to shift most of its business from being hosted on AWS to building their own infrastructure.