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Small black microSD card with red accent and 128GB label

SAMSUNG

SAMSUNG MB-MD128KA 128GB MicroSD PRO Plus (2021) memory card

SKU CH-5D83-K6Y7Y

A 128 GB microSD card rated U3 and A2 delivers up to 160 MB/s read and 120 MB/s write for 4K video capture on phones, drones, tablets or gaming consoles

  • Card typeMicro SD
  • TypeMicro SD
  • Capacity128 GB
  • Speed Class Ratingclass_10
  • Read Speed160 megabytes_per_second
  • Write Speed160
  • Read up to 160 MB/s for fast file transfers
  • Write up to 120 MB/s for smooth 4K video capture
  • U3 and V30 ratings guarantee sustained recording performance
  • A2 rating speeds up app loading on tablets and consoles
  • Waterproof, temperature-proof and X-ray proof for rugged reliability

128 GB MicroSD for 4K capture and gaming

The Samsung MB-MD128KA is a 128 GB microSDXC card built for continuous 4K UHD video recording on compatible phones, drones and tablets. Its A2 rating also supports faster app loading for high-performance games on handheld gaming devices.

Thermals and power in normal use

As a solid-state memory card it has no moving parts, produces no audible noise and draws minimal power from the host device. The card is rated temperature-proof and water-proof for reliable operation in demanding environments.

Build quality and daily handling

The card measures 1.5 cm by 1.1 cm and weighs 0.26 g, fitting the standard microSD form factor for direct slot insertion. It carries Class 10, U3 and V30 speed ratings for sustained write performance. Buyers who need capacities above 128 GB should consider larger cards.

Highlights

  • Read up to 160 MB/s for fast file transfers
  • Write up to 120 MB/s for smooth 4K video capture
  • U3 and V30 ratings guarantee sustained recording performance
  • A2 rating speeds up app loading on tablets and consoles
  • Waterproof, temperature-proof and X-ray proof for rugged reliability

Specifications

BrandSAMSUNG
Card typeMicro SD
ModelMB-MD128KA
Part NumberMB-MD128KA
TypeMicro SD
Capacity128 GB
Speed Class Ratingclass_10
Read Speed160 megabytes_per_second
Write Speed160

Questions about this item

How do I install the microSDXC card and what step is often missed?

Insert the card label-side up into the device slot until it clicks; the step many miss is formatting it to exFAT in the device settings before first use.

What maintenance or replacement will this card need over time?

No scheduled maintenance is required; replace the card if write errors appear or after heavy 4K recording wears the NAND beyond its endurance.

What limit appears first during sustained 4K video capture?

The 120 MB/s sequential write ceiling is reached before the 160 MB/s read limit, capping continuous 4K bit-rate recording.

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