Everspin Technologies, a US-based developer and manufacturer of data storage technology, closed a $29m series B round yesterday featuring Western Digital Capital, the investment unit of hard disk drive producer Western Digital.

Semiconductor foundry GlobalFoundries also joined the round, which previously closed at $15m in 2013. New Venture Partners, Sigma Partners, Lux Capital, Draper Fisher Jurvetson and Epic Ventures had already contributed funding.

The company, spun out off semiconductor manufacturer Freescale in 2008, raised $44.5m in a series A round…