Smartphone storage has quietly become one of the most important factors in how well AI runs on a device. As more AI features move off cloud servers and onto phones directly, the storage chip has to do a lot more work, faster, and with less power. Samsung just made a significant move on that front.
The company announced it has developed the industry’s first UFS 5.0 storage solution, achieving a sequential read speed of 10.8GB/s and a sequential write speed of 9.5GB/s. Both figures are more than double the speeds delivered by the previous UFS 4.1 standard. Samsung says it is the fastest mobile storage solution in the industry right now.
The timing matters. Running large language models directly on a phone requires moving enormous amounts of data between storage and the processor with minimal delay. Faster storage means lower latency and quicker responses when users interact with AI features. That gap between a fluid AI experience and a sluggish one often comes down to how quickly the device can read and write data locally.
Beyond raw speed, Samsung addressed two other practical concerns: power draw and physical size. The UFS 5.0 solution is more than 40% more power-efficient than the UFS 4.1, achieved through technologies like clock gating and multi-voltage operation. That kind of efficiency gain matters a lot in a smartphone, where every bit of saved power translates directly into longer battery life.
The physical package is also smaller. At 7.5mm x 13mm x 0.9mm, it is 16.7% smaller than the previous generation. A smaller chip gives device makers more flexibility when designing their hardware, especially in categories where space is extremely limited:
- Flagship smartphones
- XR headsets and mixed reality glasses
- AI-powered wearables
Jangseok Choi, head of Memory Product Planning at Samsung Electronics, framed the development as a shift in how storage is understood. “In the era of on-device AI, storage devices are evolving into a key driver defining AI experiences,” he said. That is a notable departure from how storage has traditionally been discussed, as a passive place to keep files rather than an active part of how a device performs.
The broader context here is the rapid shift of generative AI workloads from cloud infrastructure to local devices. Cloud-based AI requires a network connection and introduces latency. On-device AI is faster and works offline, but it demands more from the hardware. Storage is now part of that performance equation in a way it simply was not a few years ago.
Samsung plans to start mass production of UFS 5.0 in the fourth quarter of 2026, with capacities going up to one terabyte. The company has not named specific device partners yet, but given Samsung’s position as both a chip manufacturer and a phone maker, its own Galaxy lineup is a logical first destination for the new storage.
The UFS standard itself is set by JEDEC, the semiconductor industry body, and UFS 5.0 is the latest version of that spec. Samsung’s solution is the first to reach this speed milestone under that standard. Competitors will follow, but Samsung is establishing the benchmark that others will now have to match.