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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

  • TypeSecure Digital Extended Capacity (SDXC)
  • Capacity128GB
  • Speed Class RatingC10, U3, V30
  • Read SpeedUp to 170MB/s
  • Write SpeedUp to 90MB/s
  • 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.

Highlights

  • 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

Specifications

BrandSanDisk
SeriesExtreme Pro
ModelSDSDXXY-128G-GN4IN
TypeSecure Digital Extended Capacity (SDXC)
Capacity128GB
Speed Class RatingC10, U3, V30
Read SpeedUp to 170MB/s
Write SpeedUp to 90MB/s
FeaturesPerfect for shooting 4K UHD video and sequential burst mode photography Capture uninterrupted video with UHS Speed Class 3 (U3) and Video Speed Class 30 (V30) Built for and tested in harsh conditions: Temperature-proof, waterproof, shockproof, and x-ray-proof

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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