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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

  • Total capacity128 GB
  • Memory card formatMicro SD
  • Speed classClass 10
  • Max read speed160 MB/s
  • Write throughput160
  • Product typeMicro SD
  • 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.

How it compares

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

Price $72.99
Pricier than about 63% 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 $570.23 per TB
Pricier than about 68% of the 901 comparable items (median $374.69 per TB).

Specifications

Product
Brand nameSAMSUNG
Model nameMB-MD128KA
Part numberMB-MD128KA
Total capacity128 GB
Product typeMicro SD
Performance
Speed classClass 10
Max read speed160 MB/s
Write throughput160
Storage
Memory card formatMicro SD

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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