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SanDisk SDSDXDK-128G-GN4IN 128GB Extreme PRO SDXC UHS-II Card — main product image
SanDisk SDSDXDK-128G-GN4IN 128GB Extreme PRO SDXC UHS-II Card
SanDisk SDSDXDK-128G-GN4IN 128GB Extreme PRO SDXC UHS-II Card
SanDisk SDSDXDK-128G-GN4IN 128GB Extreme PRO SDXC UHS-II Card
SanDisk SDSDXDK-128G-GN4IN 128GB Extreme PRO SDXC UHS-II Card
SanDisk SDSDXDK-128G-GN4IN 128GB Extreme PRO SDXC UHS-II Card
SanDisk

SanDisk SDSDXDK-128G-GN4IN 128GB Extreme PRO SDXC UHS-II Card

8K4KUSB-C

Capture 8K and 4K video without hesitation using SanDisk's fastest SD card with 300MB/s reads and V90-rated sustained performance.

$134.66*$189.99Save 29%
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*Price sourced from Amazon.com. Last updated:Sep 05, 2026.Price and availability are subject to change — details.

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Overview

The SanDisk Extreme PRO SDXC UHS-II 128GB card is engineered for professionals who cannot afford dropped frames or missed shots. With read speeds reaching up to 300MB/s and write speeds up to 260MB/s, it ranks among the fastest SD cards available, making it a strong choice for photographers working in continuous burst mode and videographers capturing high-bitrate 8K or 4K footage. The V90 video speed class guarantees a minimum sustained write speed of 90MB/s, ensuring smooth, uninterrupted recording even at the highest resolutions.

Beyond raw speed, the card is built to survive demanding conditions. Its shockproof, waterproof, temperature-proof, and X-ray-proof construction means it can travel from studio to remote location without worry. The 128GB capacity strikes a practical balance between storage space and cost, offering enough room for extended shooting sessions while keeping the per-card investment reasonable. For post-production, pairing this card with a compatible UHS-II reader unlocks the full 300MB/s transfer rate, dramatically cutting the time spent moving large files to your editing workstation.

Key Features

Tap into pro performance designed for professional and advanced photographers and videographers.

Super-fast write speeds of up to 260MB/s help rapidly clear buffer time to support continuous burst mode shooting and cinema-quality video recording(2). Requires compatible devices capable of reaching such speeds.

Sustained V90 video speeds and UHS Speed Class 3 (U3) deliver cinema-quality 8K, 4K and Full HD video recording.(1)(2)

Extreme transfer speeds up to 300MB/s help achieve maximum postproduction workflow efficiency. Requires compatible devices capable of reaching such speeds such as the SanDisk Extreme PRO SD UHS-II USB-C Reader (sold separately).

Travel from studio to location worry-free with shockproof, temperature-proof, waterproof, and X-ray-proof design.(5)

Specifications

Brand
SanDisk
Model
SDSDXDK-128G-GN4IN
Capacity
128 GB
Card Type
SDXC UHS-II
Read Speed
Up to 300 MB/s
Write Speed
Up to 260 MB/s
Speed Class
C10, U3, V90
Video Support
8K, 4K, Full HD
Durability
Shockproof, Temperature-proof, Waterproof, X-ray-proof
Dimensions
1.26" x 0.94" x 0.09"

Frequently Asked Questions

This card works with any device that accepts SDXC UHS-II cards. To achieve the full 300MB/s read speed, you need a UHS-II compatible device or reader such as the SanDisk Extreme PRO SD UHS-II USB-C Reader.
Yes. With write speeds up to 260MB/s, the card clears the camera buffer quickly, allowing sustained burst shooting without the camera slowing down or stopping.
Yes. The V90 video speed class rating ensures a minimum sustained write speed of 90MB/s, which meets the requirements for 8K, 4K, and Full HD video recording.
The card is shockproof, temperature-proof, waterproof, and X-ray-proof, making it reliable for use in harsh shooting environments and safe to pass through airport security scanners.
UHS-II cards like this one feature a second row of pins on the back, enabling much faster transfer speeds. This card reaches up to 300MB/s read and 260MB/s write, compared to typical UHS-I maximums around 100MB/s.

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