Samsung Galaxy S25 Ultra with UFS 4.0: Here is what to expect in storage, speed, power efficiency and more

Samsung Galaxy S25 Ultra will focus on design revamps but it will also offer fast storage and file transfer rate featuring UFS 4.0, revealed some leaked files and Android codes via AndroidAuthority.

Universal Flash Storage or UFS is a high-speed integrated storage to process smartphone data and improve storage power consumption efficiency compared to embedded Multimedia Cards. This storage type enables users to experience high performance in 4K, 8K media content, games, and other in-device apps.

UFS 4.0 offers a major improvement over 3.1 in a smaller size and more performance.

Transfer Rate

UFS 4.0 boasts up to 23.2 gigabits per second (Gbps) per lane. that’s twice of UFS 3.1 devices.

This storage version is tailored for 5G smartphones, providing support for large amounts of data processing such as high-resolution images, high-performance games, and AR/VR applications.

Read and Write

It utilizes Samsung’s 7th gen V-NAND technology with a proprietary controller to improve read and write speed. In lab tests, the storage has achieved 4,200 megabytes per second (MB/s) and a sequential write speed of 2,800 MB/s.

Users with UFS 4.0 devices can experience 2x and 1.6x fast file transfers over 3.1.

Samsung UFS 4.0 Storage (Credit – Samsung)

Power Efficiency

Galaxy S25 Ultra could deliver better power efficiency, it will deliver up to 6.0 MB/s sequential read speed per milliampere (mA). That’s a 46 percent improvement over the predecessor and could save a large chunk of battery level while allocating storage for different tasks.

Data protection and size

Samsung has integrated a Replay Protected Memory Block (RPMB) into the UFS 4.0 chip. Its design is 1.8x efficient in data storage for reading and writing via authenticated access.

It stores data in a specific memory behind the authentication wall to protect from replay attacks and protect login credentials and personal ID details. It is 1.0mm slim, 13mm long, and 11mm wide, providing space efficiency for compact integration.

Also used in S24 Ultra

That’s right, the existing Ultra model also has UFS 4.0 storage and it’s good. Its transfer, read, and write speeds are excellent. Therefore, we can expect a good file transfer experience with S25 Ultra as well.

However, there’s one more thing that you should know.

The new flagship will feature Snapdragon 8 Elite chipset and it has some new improvements. This chip is processed with 3nm technology including a 45% performance boost, 44% power efficiency, and a larger shared data cache.

The chip has a new Adreno GPU, which is expected with 40% graphics performance and 40% efficiency improvements. The system-wide power saving is improved by 27 percent.

Looking at more statistics, Qualcomm has also ramped up AI power in this chipset, it could deliver up to 45% AI and 45% per watt performance. The new ISP is fused with Hexagon NPU for better camera and media management.

So, what to make all of these chip advancements?

These collective improvements in CPU speed, GPU, ISP, and AI will use resources with increased efficiency and better resource management could contribute to an optimized UFS performance than S24 Ultra.

So, we have some expectations that the Galaxy S25 Ultra could go a few steps further than its predecessor with UFS 4.0. Meanwhile, a previous report suggests, that Samsung Galaxy S25 Ultra will come in 256GB, 512GB, and 1TB storage.