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QUICK PICKER HOST & WORKLOAD

Which microSD do you actually need? Start with the job.

Use the host requirements and workload to choose a card. These checks help define an RFQ; final model suitability requires the datasheet and sample validation.

Recommended: Camera-approved card with documented enduranceHost-required speed class, write workload and temperature rating

Continuous recording repeatedly overwrites the card. Service life depends on write volume, capacity, NAND, controller behavior and temperature; a consumer label alone does not predict a failure date.

  • Match the exact camera model and recording mode to its approved card requirements
  • Compare a documented endurance rating with your recording workload and stated test conditions
  • A2 is an application rating; it does not replace the required video speed class or endurance evidence
  • Check the card operating-temperature limits and the actual installation environment

SD and microSD sourcing requirements

Confirm the exact model, datasheet and qualification scope before ordering.

Choosing a microSD for dashcam & cameras

Recording load, capacity and camera compatibility.

High-endurance vs consumer microSD

Compare endurance claims and their operating conditions.
Recommended: Host-compatible capacity and application performanceA1/A2 where random-access workloads and host support justify it

A1/A2 describe application performance, including random access. They can be relevant to phones, handhelds and single-board computers; A2 gains depend on compatible host features and software support.

  • Check host-supported card capacity, format and filesystem
  • Choose A1/A2 using the application workload and host support
  • For video, follow the device manual and recording-mode requirements rather than resolution alone
  • Verify addressable capacity separately from brand authenticity and expected service life

How to choose the right microSD

A buying guide by workload and host.

SD card speed classes explained

Separate sustained video performance from random application performance.
Recommended: Camera-approved speed class and sustained-write marginRecording bitrate, codec and host requirements determine the class

Resolution alone does not determine the card class. Check the camera model, codec, bitrate and recording mode, then validate sustained writing on the intended system. Peak read speed does not describe this workload.

  • Use the speed class required by the camera manual for the selected mode
  • Validate sustained writing and recording stability with the actual host
  • Back up data before a full-address write/read capacity test; a pass does not prove brand origin or endurance
  • Check capacity, thermal conditions and recording duration together

SD card speed classes explained

U3, V30, V60 and V90 under their specified conditions.

Test for falsely reported capacity

Understand what a full-address write/read check can and cannot establish.

How to choose the right microSD

Match the card to the workload.

Standards reference: SD Association speed classes and application performance classes.

Review Test Methods

B2B wholesale — distributors, resellers and OEMs. Recommendations are general guidance; tell us the device and volume for a spec'd quote.