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Small rectangular microSD card with full-size SD adapter

Ackmioxy

Ackmioxy Extreme 128GB microSDHC UHS-I memory card

SKU CH-6GY7-6WF4X

Stores 128 GB with up to 100 MB/s read speed, C10, U3, V30 and A2 ratings for 4K capture

  • Total capacity128 GB
  • Memory card formatMicroSD
  • Speed classUHS-I
  • League or teamUFC / MMA

Capacity 128G

  • 128GB capacity stores hours of 4K footage
  • UHS-I U3 V30 A2 ratings sustain 30MB/s write for smooth recording
  • Up to 100MB/s read speed transfers large files quickly
  • Includes adapter for use in full-size SD slots
  • Built for action cams drones and handheld gimbals

High-capacity microSD card for action cameras

The Ackmioxy Extreme 128GB microSDHC UHS-I card targets creators who need reliable storage for 4K video and burst photography. It suits professionals and enthusiasts using drones, action cams or mirrorless cameras that accept the microSD form factor. Buyers who require capacities beyond 128GB or need UHS-II speeds for sustained high-bitrate recording should consider other options.

Adapter extends device compatibility

A full-size SD adapter is included, letting the card work in standard SD slots on cameras, laptops and card readers. This accessory removes the need for a separate purchase when switching between microSD and full-size SD devices. The card carries C10, U3, V30 and A2 ratings, supporting 4K capture and faster app performance on compatible hardware.

Simple installation with standard precautions

Insert the card into the device slot until it clicks, then format it in-camera before first use to ensure the correct file system. Avoid removing the card while data is writing, as interruption can corrupt files. Handle the contacts carefully and store the card in its case when not in use to prevent physical damage.

How it compares

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

Price $21.99
Cheaper than about 76% 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 $171.80 per TB
Cheaper than about 87% of the 901 comparable items (median $374.69 per TB).

Specifications

Product
Brand nameBtyeuni
Product lineExtreme
Total capacity128 GB
Performance
Speed classUHS-I
Storage
Memory card formatMicroSD
More details
League or teamUFC / MMA

Other versions of this model

5 more in the same range

Questions about this item

Will the 128 GB capacity fill up quickly when recording 4K video at the card's rated speed?

The card sustains a minimum write speed of 30 MB/s, which matches the V30 rating required for 4K capture; a 128 GB card holds roughly four hours of typical 4K footage before you need to offload.

What speed ceiling will I hit first during long bursts or continuous 4K recording?

The UHS-I interface caps sequential read at 100 MB/s and the V30 class guarantees 30 MB/s sustained write, so the write floor is the first limit you reach under heavy load.

Does the card run hot or draw extra power when used all day in an action camera?

MicroSD cards consume very little power and generate minimal heat; the UHS-I design stays within standard bus limits, so temperature and battery impact stay negligible during extended shoots.

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