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Small black microSDXC card with gold contacts, includes SD adapter and mini case

Gigastone Corporation

Gigastone Corporation 256-3-1 256GB MicroSDXC UHS-I A1 U3 V30 100MB/s memory card

SKU CH-29P5-Z9P2A

A 256 GB microSDXC card with UHS-I speeds up to 100 MB/s read and 60 MB/s write, rated A1, U3, V30 and Class 10 for 4K video and app performance

  • Card typeMicroSD
  • TypemicroSDXC
  • Capacity256GB
  • Speed Class RatingA1 / Class 10 / U3 / UHS-I / V30
  • Read SpeedUp to 100MB/s
  • Write SpeedUp to 60MB/s

Capacity 256GB

Series Camera Plus

Struck-through versions exist but are not stocked here.

Option 1-Pack

  • 256GB capacity stores hours of 4K footage
  • U3 and V30 ratings sustain 30MB/s minimum write for 4K video
  • A1 rating speeds up app loading on smartphones
  • Waterproof, shockproof, temperature-proof and X-ray proof for rugged use
  • Up to 100MB/s read and 60MB/s write for fast transfers

256GB microSDXC UHS-I card

This 256GB Gigastone microSDXC card carries UHS-I, Class 10, U3, V30 and A1 ratings. It delivers sequential read speeds up to 100MB/s and write speeds up to 60MB/s. The card is built to withstand water, shock, temperature extremes and X-ray exposure. A full-size SD adapter and a mini storage case are included.

For action cameras, drones and app-heavy phones

The A1 rating means the card can run apps directly on smartphones and tablets. V30 guarantees sustained 30MB/s write performance for 4K video recording. Buyers who need guaranteed minimum write speeds above 30MB/s for higher-bitrate workflows should consider cards with a higher video speed class rating.

V30 sustained write class for 4K capture

The single specification that decides suitability is the V30 video speed class, which certifies a minimum sequential write speed of 30MB/s. This meets the baseline requirement for most consumer 4K recording. If your device demands a higher guaranteed write tier, this card will not satisfy that requirement.

Highlights

  • 256GB capacity stores hours of 4K footage
  • U3 and V30 ratings sustain 30MB/s minimum write for 4K video
  • A1 rating speeds up app loading on smartphones
  • Waterproof, shockproof, temperature-proof and X-ray proof for rugged use
  • Up to 100MB/s read and 60MB/s write for fast transfers

Specifications

BrandGigastone Corporation
Card typeMicroSD
SeriesCamera Plus
Model256-3-1
Part Number256-3-1
TypemicroSDXC
Capacity256GB
Speed Class RatingA1 / Class 10 / U3 / UHS-I / V30
Read SpeedUp to 100MB/s
Write SpeedUp to 60MB/s
Features[Ultra HD] Read/Write up to 100/60 MB/s. 4K Ultra HD video displaying/recording
[Compatibility] Storage for Laptop, Tablet, PC, Smartphones, Camera, e-Reader. Files, Videos, Music
[Environment] Waterproof, shockproof, temperature-proof and X-Ray proof
[Cost-effective] 1 Micro SD Card, 1 Micro SD to SD Adapter, 1 Mini Case
[Support] Gigastone 5-year limited warranty

Other versions of this model

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Questions about this item

Does the 256GB microSDXC card need an adapter to work in a full-size SD slot?

The package includes a microSD-to-SD adapter so the card fits standard SD slots on laptops, cameras or card readers.

Will the UHS-I U3 V30 card record 4K video reliably in an older action camera that only supports UHS-I?

Yes, the U3 and V30 ratings guarantee a minimum 30 MB/s sustained write speed, meeting 4K recording requirements on any UHS-I host.

How can I confirm the card delivers the advertised 100 MB/s read speed after formatting?

Run a sequential read benchmark such as CrystalDiskMark or Blackmagic Disk Speed Test on a USB 3.0 or UHS-I reader; expect results near 100 MB/s.

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