Wise Advanced 256GB SD-N UHS-II SDXC Memory Card

The Wise Advanced 256GB SD-N UHS-II SDXC Memory Card (Model: SD-N256) is an enterprise-tier removable storage card engineered for high-performance cinema payloads, continuous RAW burst photography, and high-bitrate 4K/8K video capture.

Just like its larger 512GB sibling, the SD-N (V90) lineup utilizes premium pSLC (Pseudo Single-Level Cell) NAND Flash memory. While standard consumer SD cards use multi-level cells that cause write speeds to fluctuate wildly as the card fills up, pSLC architecture treats the memory cells as single-level caches. This delivers incredibly stable, flat-line write performance and a much higher lifecycle endurance rating.

Core Speed and Class Classifications

• V90 Video Speed Class: The definitive standard for high-end video recording. While peak burst speeds look good on the box, video tracking requires sustained continuity. The V90 certification legally guarantees that the card's continuous write speed will never drop below a hard baseline of 90 MB/s, completely preventing dropped frames or sudden buffer crashes mid-take.

• Dual-Row UHS-II Interface: Flip the card over, and you will see a two-row copper pin arrangement. This design handles high-bandwidth bus data routing. It remains fully backward-compatible with legacy single-row UHS-I cameras, though running it in a UHS-I slot drops data bus speeds to standard legacy bottlenecks ($\approx 10\text{ MB/s}$ to $30\text{ MB/s}$ limits).

Technical Specifications Matrix

Rugged Production-Set Guardrails

Wise builds the SD-N series to withstand harsh field environments. The composite housing features internal structural seals rendering the memory block:

1. Waterproof and Dustproof: Protected against high moisture environments and fine particulate ingress.

2. Shockproof and Stress-Resistant: Capable of surviving physical drops, equipment case vibration, and bending forces.

3. Airport X-Ray Proof: Impervious to the magnetic and radiation scanning arrays found inside transit security checks, protecting your master footage from corruption.

Native Camera Targets

The 256GB capacity tier balances extended recording times with smart data-management risk practices (avoiding putting an entire multi-day shoot on a single piece of media). It is a standard choice for platforms like the Canon EOS C70, Panasonic Lumix GH7 / S5IIX, Blackmagic Pocket Cinema Camera 4K, and Sony FX3 / FX30 when capturing high-frame-rate All-Intra 4K profiles or uncompressed raw log stills.