Western Digital’s fiscal first-quarter 2027 exabyte shipments, due for disclosure with earnings on October 22, are shaped by robust AI and hyperscale cloud demand that drove 231 exabytes shipped in fiscal Q4 2026, a 22 percent year-over-year increase. Management projects industry exabyte demand growth above 25 percent annually, supported by long-term agreements extending into 2028–2031 and the ramp of 40-terabyte ePMR drives now entering volume production. Revenue guidance of $4.1 billion plus or minus $100 million for the quarter exceeds the prior period’s $3.75 billion, reflecting both volume and high-teens percentage gains in average price per terabyte amid tight nearline HDD supply. Quarterly shipment growth can fluctuate with product mix, while Toshiba’s planned capacity expansion introduces potential competitive pressure on pricing discipline. Traders will focus on whether the 40-terabyte ramp and sustained cloud spending accelerate exabyte growth beyond recent levels.