Tech Field Day briefing with Primary Data. During the VMworld 2015 Conference in San Francisco there was another event, Tech Field Day Extra, which was going on at the same time during the conference. I was one of the panelist for Tech Field Day Extra and had the opportunity to be a part of the briefing from a company called Primary Data to showcase DataSphere. DataSphere is a dynamic, objectives-driven data mobility virtualization platform across different storage types and tiers.