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Red rectangular SDXC memory card with black label and gold contacts

SanDisk

SanDisk SDSDUN4-256G-GN6IN 256GB Ultra SDXC UHS-I Class 10 memory card

SKU CH-G051-8GF0G MPN SDSDUN4-256G-GN6IN

256GB SDXC card with UHS-I Class 10 speed for Full HD video and 120MB/s read transfers

  • Total capacity256 GB
  • Memory card formatFull Size SD
  • Speed classUHS-I / U1 / Class 10
  • Max read speed120 MB/s
  • Product typeSecure Digital Extended Capacity (SDXC)

Capacity 256GB

  • 256GB capacity stores thousands of photos and Full HD videos
  • Read speeds up to 120MB/s move large files quickly to your computer
  • UHS-I U1 Class 10 rating guarantees smooth 1080p video recording without dropped frames
  • Full-size SDXC format fits standard slots in DSLRs, mirrorless and point-and-shoot cameras
  • SanDisk Ultra series reliability protects irreplaceable memories shot after shot

256GB SDXC card for everyday shooting

This SanDisk Ultra SDXC card provides 256GB of storage for compact and mid-range point-and-shoot cameras. It carries UHS-I, U1 and Class 10 speed ratings for reliable Full HD 1080p video capture. Read speeds reach 120MB/s to move files quickly.

Standard full-size SD form factor

The full-size SD design fits any SDXC-compatible slot without adapters. UHS-I interface support means the card works with a broad range of current and older devices. A SanDisk UHS-I reader can deliver the same 120MB/s transfer rate for fast backups.

Step up from slower or smaller cards

Photographers moving up from Class 4 or Class 6 media gain the sustained write performance needed for 1080p recording without dropped frames. The 256GB capacity also replaces multiple lower-capacity cards, reducing swaps during long sessions.

How it compares

Measured against everything we stock in SD & MicroSD Memory Cards, at today’s prices. Recalculated every night.

Price $36.99
Cheaper than about 58% of the 1,947 comparable items (median $46.99).
Total capacity 256 GB
Higher than about 80% of the 1,132 comparable items (median 64 GB).
Price per TB $144.49 per TB
Cheaper than about 91% of the 901 comparable items (median $374.69 per TB).

Specifications

Product
Brand nameSanDisk
Product lineUltra
Model nameSDSDUN4-256G-GN6IN
Total capacity256 GB
Product typeSecure Digital Extended Capacity (SDXC)
Performance
Speed classUHS-I / U1 / Class 10
Max read speed120 MB/s
Storage
Memory card formatFull Size SD
Size & build
Shipping weight0.01 kg
Package size152 × 102 × 5 mm

Other versions of this model

4 more in the same range

Questions about this item

What does the UHS-I interface on this SDSDUN4-256G-GN6IN card cap read speed at in practice?

The UHS-I bus on this SanDisk Ultra card limits maximum read throughput to 120MB/s, which is the rated speed printed on the label.

What physical slot size does the full-size SD form factor of this 256GB card require?

It fits any standard SDXC slot that accepts full-size Secure Digital cards; microSD adapters are not needed.

How is the card prepared for first use in a camera, and what step do people often skip?

Insert the card, then format it in the camera menu before shooting; skipping the in-camera format can cause file-system errors.

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