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Small black microSDXC card with white Samsung PRO Endurance branding

SAMSUNG

SAMSUNG PRO Endurance 256GB microSDXC MB-MJ256KA/AM memory card

SKU CH-MW0T-8STGS MPN MB-MJ256KA/AM

High-endurance microSDXC card rated UHS-I U3 V30 for continuous 4K recording at up to 100 MB/s read and 40 MB/s write

  • Total capacity256 GB
  • Speed classUHS-I / U3 / Class 10 / V30
  • Max read speedUp to 100 MB/s
  • Write throughputUp to 40 MB/s
  • Product typeMicroSDXC

Capacity 256GB

  • Continuous recording reliability with V30 sustained write rating
  • Fast file access up to 100 MB/s read speed
  • 256GB capacity stores extensive high-resolution footage
  • UHS-I U3 Class 10 compatibility across devices
  • Durable design built for demanding surveillance workloads

Continuous recording capacity

The SAMSUNG PRO Endurance 256GB microSDXC card targets dash-cam owners, security installers and home-monitoring users who write video around the clock. Its 256GB capacity stores days of footage before the oldest files are overwritten. The V30 rating guarantees a minimum 30 MB/s sustained write so 4K streams never drop frames.

Speed class impact on workflow

The UHS-I interface with U3 and Class 10 ratings delivers up to 100 MB/s read and 40 MB/s write. Fast read speeds let investigators pull large evidence files to a laptop quickly. The 40 MB/s write ceiling handles multiple simultaneous cameras without buffering delays. No bundled software or adapters are mentioned in the specifications.

Durability and daily handling

The PRO Endurance line is engineered for constant overwrite cycles in high-temperature enclosures. A microSDXC form factor fits directly into action cameras, drones and single-board computers without an adapter. The card resists shock, vibration and extreme temperatures so footage survives vehicle impacts or outdoor exposure.

How it compares

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

Price $119.99
Pricier than about 76% of the 1,947 comparable items (median $46.99).
Total capacity 256 GB
Higher than about 80% of the 1,132 comparable items (median 64 GB).
Price per TB $468.71 per TB
Pricier than about 60% of the 901 comparable items (median $374.69 per TB).

Specifications

Product
Brand nameSAMSUNG
Product linePRO Endurance
Model nameMB-MJ256KA/AM
Total capacity256 GB
Product typeMicroSDXC
Performance
Speed classUHS-I / U3 / Class 10 / V30
Max read speedUp to 100 MB/s
Write throughputUp to 40 MB/s
Size & build
Shipping weight0.02 kg
Package size154 × 103 × 3 mm

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