At California’s Flash Memory Summit (FMS) 2025, SanDisk demonstrated a functional prototype of the world’s highest-capacity SSD — a 256 TB drive. Developed using the new UltraQLC platform, the drive targets complex AI and big data applications. Set for release in early 2026 (in U.2 form factor), the SSD is positioned for high-intensity environments requiring rapid data collection and preprocessing. Its development focused on boosting efficiency while lowering total cost of ownership (TCO).
The SSD leverages BiCS8 QLC NAND memory, doubling data density to 2Tb per die while maintaining chip compactness. Its Direct Write to QLC technology bypasses traditional SLC caching, writing data directly to QLC cells with power-loss protection — enhancing both write reliability and efficiency. SanDisk also claims a 33% reduction in data retention refresh cycles, improving drive endurance and cutting energy consumption.
According to Khurram Ismail, SanDisk’s Director of Product Management, the UltraQLC platform results from years of effort to create an adaptable architecture that delivers "high capacity and performance with an emphasis on efficiency." Alongside the 256 TB model, a 128 TB variant (SanDisk SN670) is also planned under the UltraQLC lineup. Pricing remains unannounced.
-
When Encryption Isn't Enough: Team Group Unveils SSD With a Self-Destruct Button -
Small but Mighty: Minisforum Unveils UM750L Slim with Ryzen 5 and Up to 8TB SSD -
SanDisk Unveils WD Black SN8100 SSD: Blazing PCIe 5.0 Speeds and Remarkably Low Power Consumption -
PCIe 6.0 on the Horizon: Phison and Micron Showcase SSDs Hitting 30 GB/s -
Silicon Motion Unveils Neptune: A PCIe 6.0 SSD Controller for the Future