After four years of SMR storage, here's what we love—and what comes next In 2018, Dropbox became the first major tech company to adopt high-density SMR (shingled magnetic recording) technology for our storage drives. By 2019, our SMR fleet size was around 25%. Today, a staggering 90% of our total HDD fleet size is now SMR capable, and we’ve continued to lead the industry in adoption with the deplo