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Small rectangular SDXC card, gold contacts visible, red and black label with Extreme Pro branding

SanDisk

SanDisk Extreme Pro 128GB SDXC UHS-I Memory Card

SKU CH-A6PX-HJMEE

128 GB SDXC card rated C10, U3 and V30 delivers 90 MB/s write and 170 MB/s read for 4K UHD video and burst photography

  • Total capacity128 GB
  • Speed classC10, U3, V30
  • Max read speedUp to 170 MB/s
  • Write throughputUp to 90 MB/s
  • Product typeSecure Digital Extended Capacity (SDXC)
  • Key featuresPerfect for shooting 4K UHD video and sequential burst mode
  • Shot speeds up to 90MB/s for fast burst photography
  • Transfer speeds up to 170MB/s accelerate post-production workflow
  • UHS Speed Class 3 and V30 sustain 4K UHD video recording
  • Temperature-proof, waterproof, shockproof and x-ray-proof durability
  • 128GB SDXC capacity stores extensive high-resolution media

Capacity and target use

The SanDisk Extreme Pro is a 128GB SDXC memory card rated for UHS Speed Class 3 and Video Speed Class 30. It is intended for photographers and videographers who need reliable storage for 4K UHD recording and sequential burst shooting.

UHS-I bus limits

The card operates on the UHS-I interface, so maximum throughput is bounded by that bus design. Sustained write performance reaches 90MB/s while read speeds peak at 170MB/s, and both figures require a host device and reader that fully support the UHS-I specification.

Durability and daily handling

Built for harsh environments, the card is tested to be temperature-proof, waterproof, shockproof and x-ray-proof. The standard SD form factor fits directly into camera slots and most laptop readers, letting you move media between devices without adapters or special mounting.

How it compares

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

Price $40.99
Cheaper than about 55% of the 1,947 comparable items (median $46.99).
Total capacity 128 GB
Higher than about 60% of the 1,132 comparable items (median 64 GB).
Price per TB $320.23 per TB
Cheaper than about 57% of the 901 comparable items (median $374.69 per TB).

Specifications

Product
Brand nameSanDisk
Product lineExtreme Pro
Model nameSDSDXXY-128G-GN4IN
Total capacity128 GB
Product typeSecure Digital Extended Capacity (SDXC)
Performance
Speed classC10, U3, V30
Max read speedUp to 170 MB/s
Write throughputUp to 90 MB/s

Questions about this item

Should I pick the 128 GB version or a larger capacity for 4K UHD video?

The 128 GB card falls inside the 64 GB to 512 GB range that delivers up to 170 MB/s read and 90 MB/s write speeds, so it is well suited for 4K UHD recording.

What do the 170 MB/s read and 90 MB/s write figures mean when I put the card in my camera?

They are maximum transfer rates; sustained write performance is guaranteed at 30 MB/s by the V30 rating, ensuring smooth 4K UHD capture without dropped frames.

How does the UHS-I interface affect the speeds I will actually see?

The card uses the UHS-I bus with U3 and V30 ratings, guaranteeing a minimum 30 MB/s sustained write for 4K UHD video while allowing burst reads up to 170 MB/s on compatible readers.

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