David Goeckeler
Chief Executive Officer at Western Digital
Thank you, Peter. Good morning everyone and thanks for joining the call to discuss our fourth quarter and fiscal 2022 results. I'm pleased that the Western Digital team executed well and delivered solid results in light of the ongoing macro and geopolitical dynamics. We reported fourth quarter revenue of $4.5 billion. Non-GAAP gross margin of 32% and non-GAAP earnings per share of $1.78, all within the guidance ranges we provided in April.
Fiscal year 2022 revenue totaled $18.8 billion and we reported non-GAAP earnings per share of $8.22. This compares to revenue of $16.9 billion and non-GAAP earnings per share of $4.55 in fiscal year 2021. We grew revenue 11% and EPS increased 81%, demonstrating progress in unlocking the earnings potential of our business.
In addition to strong financial performance, fiscal year 2022 was a hallmark year for Western Digital from an innovation, product development and execution perspective. In particular, we regained innovation leadership with the introduction of multiple products and technologies for the cloud. In May, we announced a 26 terabyte drive leveraging our OptiNAND and ultra SMR technologies as well as ePMR. Impressively, this means we've nearly doubled drive capacity relative to when I joined Western Digital just over 2 years ago. In flash, we expanded adoption of our NVMe enterprise SSD from one cloud titan 2.3 as well as qualification at several enterprise OEM suppliers.
From an organization perspective, we have bolstered the company's executive management team further strengthening our ability to drive operational excellence, innovation and disciplined financial management. On top of all of these achievements, we reduced debt by $1.7 billion and obtained an investment-grade corporate rating placing Western Digital on a solid financial foundation.
Before I jump into into additional detail on the quarter, I wanted to provide an update on our strategic review. As you know, 2 months ago we announced that we are reviewing potential strategic alternatives aimed at further optimizing long-term value for our shareholders. The Executive Committee of the Board which I lead continues to oversee the review and elite management is participating alongside us under a non-disclosure agreement along with other interested parties.
We're evaluating a range of alternatives including options for separating our market leading flash and HDD franchises. We are moving expeditiously but this work will take time. We will not be answering any questions about the strategic review today, giving -- given the ongoing nature and confidentiality of the process. We will provide updates in the future as appropriate.
Now I'll provide updates on our HDD and flash businesses. During the fiscal fourth quarter, strong demand from our cloud customers for our latest generation energy assisted drives drove near record nearline shipments of 111 exabytes. Total HDD revenue declined sequentially due primarily to consumer and client HDD demand.
We commenced commercial shipment of a number of products incorporating our OptiNAND technology. In addition to shipments of our 20 and 22 terabyte CMR drives, qualifications of our 26 terabyte SMR drive are underway. As we noted, our product launch event in May. This SMR-enabled drive enables 20% higher capacity than our CMR variance offering significantly better TCO for our cloud customers and further highlighting the performance driven benefits of the innovation that Western Digital is packing into a hard drive.
Finally, we are ramping a second cloud customer with SMR technology this quarter and remain on track to lead the industry's transition to SMR based drives for the cloud. We are very confident in our multi-year product roadmap for capacity enterprise drives, which combine ePMR, OptiNAND, ultra SMR and triple stage actuators to deliver a cutting-edge portfolio of drives in commercial volumes at a wide variety of capacity points.
We also continue to invest in HAMR and the commercialization of this technology alongside our other HCD technologies are leading the industry. The breadth and depth of this portfolio strongly positions us to be the provider of choice for the largest and most complex data centers in the world. Building on the expertise cultivated over decades of bringing to market industry leading technologies. We are committed to leveraging our innovations to continue driving business results and capacity enterprise into the future.
Turning to flash, revenue grew sequentially on an improving product mix and increased flash supply. Growth in flash during the quarter came primarily from enterprise SSD with revenue more than doubling sequentially. Gaming is another key growth market for us where we continue to demonstrate the strength of our client SSD franchise with exabyte shipment growing nearly 70% year-over-year. We have a leading position in gaming with our WD Black brand being recognized globally for innovation performance and quality. The latest example of this is our WD Black SN850, NVMe SSD products certified for Sony PS5 game consoles, which enables players to expand the high speed storage capacity of their PSI -- PS5 console and allows them to store and play both PS5 and PS4 games directly from the drive.
On the technology front, X5 represented about half of our flash revenue in the June quarter, up from 46% in the previous quarter. We are preparing to ramp big 6 late this calendar year and into 2023 based on circuit under array architecture. Big 6 enables many exciting high performance products for 5G phones, SSDs and QLC flash.
Let me now offer a few observations on the demand environment. In the cloud end market, we experienced strength in the fiscal 4th quarter is supply constraints at Western Digital and our -- and our end customers started to ease. Overall demand from our cloud customers has been consistently strong and we expect this strength in cloud to carry into the second half of calendar year 2022. We believe the accelerated digital transformation will continue to drive cloud growth and believe we are on track to generate about our half of our revenue from this market by fiscal year '25. Outside of cloud, our expectations for calendar year 2022 demand growth have moderated since our last earnings call.
As the fiscal fourth quarter progressed, we saw consumer spending soften impacting both retail flash and HDD demand. This weakness has migrated to the consumer PC end-market as we enter the second half of the calendar year. In client, the market generally expect PC shipments to decline approximately 10% in calendar year 2022. We are seeing our PC OEM customers aggressively right size their inventory to reflect current demand conditions which will impact our business in this market in the second half of the calendar year.
After going through that correction, we expect a more normal flow of business going forward as we believe PCs will continue to fulfill broader use cases as the foundation of the increasingly comrade -- common hybrid enterprise driving unit demand above pre-pandemic levels in richer SSD content. All of these PC market dynamics are accelerating the final phase of the shift of client devices from HDD to flash technology. Consequently, the client HDD market is now declining at an accelerated rate relative to the period before the onset of the pandemic. To reflect this reality, we are now taking aggressive action to restructure our HDD manufacturing footprint to reflect this market dynamic.
In mobile, expectations for smartphone units have come down in recent months led primarily by reduced demand in China. Industry analysts expect the smartphone industry unit volume to decrease by a mid single-digit percentage year over year in calendar 2022. While we are well positioned in supplying flash memory for 5G smartphones, we are also seeing our largest customers aggressively resetting their inventories for these products. We expect the inventory correction to be primarily impact our fiscal first quarter and return to market demand for the remainder of the fiscal year.
In consumer, we have a premium brand and a great franchise in the marketplace. In particular, we have developed an enviable position and excellent relationships with major brick and mortar retailers and online retailers across the globe including Best Buy and Target in the U.S. MSH group in Europe, JD.com in China and Office Works in Australia. As a result of these strong relationships, our impressive scale product breadth and trusted brand, we lead most consumer storage product categories.
While macroeconomic factors and COVID measures have impacted consumer demand in the near term, our customers' loyalty and preference for the performance and quality of our solutions are key differentiators, which will position, Western Digital well for the upcoming back-to-school and holiday seasons.
Before turning the call over to Wissam, I want to leave you with a few takeaways. First at the Investor Day, we laid out the case where the world of ever increasing intelligent devices powered by the cloud is creating an astonishing amount of data, but which only a small percentage of stored. Our conviction remains strong and our view on near double-digit revenue growth remains intact.
Over the past several years, the storage market has entered an era of accelerated growth led by the strength of the cloud market, which drove HDD revenue growth for Western Digital and the industry. In flash, capital investments for incremental NAND bit growth are becoming more expensive, resulting in a more disciplined investment across the industry. At Western Digital, our longstanding and good growing relationships with hyperscale and OEM customers across the world coupled with our leadership in commercializing innovations for capacity enterprise hard drives and momentum with NVMe enterprise SSD for data center has made us a trusted partner. This combination of rapid demand growth in storage, technology leadership and product momentum offer Western Digital opportunities for financial outperformance.
With that, let me now turn the call over to Wissam, who will discuss our fiscal fourth quarter results and provide an outlook for the fiscal first quarter.