Data center operator Equinix grows again in Sunnyvale

If you think those family vacation photos, work presentations and music files that you store “in the cloud” don’t exist anywhere in the physical world, you’re not exactly right: All that data means a need for servers, and data centers to house them in.

So it’s no surprise that Equinix, the giant data center and internet exchange company, is growing its office-space footprint in Sunnyvale. The company recently expanded its presence in there, leasing an entire 71,000-square-foot building at 1188 E.…