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Small black microSDXC card with gold contacts, 128GB capacity, UHS-I U3 V30 A2 rating

Gigastone Corporation

Gigastone Corporation 128-4-1 128GB microSDXC memory card

SKU CH-M5PW-7E8YA

128 GB microSDXC card with UHS-I U3 V30 A2 speeds up to 100 MB/s read and 50 MB/s write for 4K video and fast app loading

  • Total capacity128 GB
  • Memory card formatMicroSD
  • Speed classA2 / U3 / UHS-I / V30
  • Max read speedUp to 100 MB/s
  • Write throughputUp to 50 MB/s
  • Variant1-Pack

Capacity 128GB

Series 4K Camera Pro

Model 1-Pack

  • Read/write up to 100/50 MB/s for smooth 4K video capture
  • A2 rating speeds up app loading on phones and tablets
  • V30 class guarantees 30 MB/s sustained write for UHD recording
  • 128 GB capacity adds ample space for games, photos and footage
  • Five-year warranty includes free data recovery from June 2021

128GB microSDXC for 4K capture

This 128GB microSDXC card targets action-camera owners, drone pilots and Nintendo Switch players who need reliable 4K video recording. The UHS-I interface and V30 rating guarantee sustained write performance for high-bitrate footage. A2 qualification also speeds up app loading on smartphones and tablets. It suits anyone expanding storage for cameras, dash cams or handheld gaming.

Thermals noise and power draw

As a solid-state memory card it has no moving parts, produces no audible noise and generates negligible heat during normal read or write activity. Power consumption is limited to the host device’s SD bus supply, so it adds no measurable drain to camera batteries or portable consoles. Operation stays silent and cool in all listed use cases.

V30 sustained write speed

The V30 speed class certifies a minimum sequential write of 30MB/s, which is the single spec that determines whether the card can keep up with 4K video streams without dropped frames. Peak read reaches 100MB/s and peak write 50MB/s, but only the guaranteed 30MB/s floor ensures uninterrupted recording. Choose this card when your device demands V30 or higher.

How it compares

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

Price $48.99
Typical for this category: the median of 1,947 items is $46.99.
Total capacity 128 GB
Higher than about 60% of the 1,132 comparable items (median 64 GB).
Price per TB $382.73 per TB
Typical for this category: the median of 901 items is $374.69 per TB.

Specifications

Product
Brand nameGigastone
Product line4K Camera Pro
Model name128-4-1
Part number128-4-1
Total capacity128 GB
Product typeMicroSDXC
Performance
Speed classA2 / U3 / UHS-I / V30
Max read speedUp to 100 MB/s
Write throughputUp to 50 MB/s
Storage
Memory card formatMicroSD
More details
Variant1-Pack

Other versions of this model

5 more in the same range

Questions about this item

How do I install the 128GB microSDXC card and what step do people often miss?

Insert the card label-side up until it clicks; the step many miss is formatting it in the device before first use so the V30 speed class is recognised correctly.

What maintenance or replacement will this A2-rated card need later?

No scheduled maintenance is required; replace the card if write speeds drop below the 50MB/s rating or if the 5-year data-recovery period from June 2021 expires.

What limit appears first during sustained 4K recording on this U3 V30 card?

The 50MB/s maximum write speed is the first bottleneck during continuous 4K capture; the 100MB/s read limit only affects offload time.

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