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Small black microSDXC card with full-size SD adapter

AGI

AGI TF138 256GB microSDXC U3 V30 A2 98/70 MBs

SKU CH-5Y4T-KCAEN

256 GB microSDXC card with U3 and V30 ratings, 98 MB/s read and 70 MB/s write speeds, plus A2 app performance and an SD adapter included

  • Total capacity256 GB
  • Memory card formatMicroSD
  • Speed classU3
  • Max read speed98 MBs
  • Write throughput70 MBs
  • Product typeMicroSDXC

Capacity 256GB

  • Read speed up to 98 MB/s for quick file access
  • Write speed up to 70 MB/s for smooth 4K video capture
  • A2 rating lets you run apps directly from the card
  • ECC technology detects and corrects data errors automatically
  • Includes SD adapter for use in cameras and card readers

Capacity and speed class

The AGI TF138 is a 256GB microSDXC card rated U3 and V30 with a Class 10 baseline. Sequential reads reach 98 MBs and writes reach 70 MBs. An SD adapter is included for use in full-size slots.

Sustained write behaviour

The V30 rating guarantees a minimum sustained write speed of 30 MBs during continuous recording. This keeps bitrate-heavy video streams stable without dropped frames. ECC technology detects and corrects transfer errors on the fly.

Compatibility check

Verify that your device supports the microSDXC standard and the UHS-I bus to achieve the stated speeds. The A2 rating benefits app loading on Android devices but requires host support. The physical write-protect switch operates only when the card is inserted into the supplied SD adapter.

How it compares

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

Price $46.99
Typical for this category: the median of 1,947 items is $46.99.
Total capacity 256 GB
Higher than about 80% of the 1,132 comparable items (median 64 GB).
Price per TB $183.55 per TB
Cheaper than about 84% of the 901 comparable items (median $374.69 per TB).

Specifications

Product
Brand nameAGI
Product lineTF138
Model nameAGI128GGSTF138
Total capacity256 GB
Product typeMicroSDXC
Performance
Speed classU3
Max read speed98 MBs
Write throughput70 MBs
Storage
Memory card formatMicroSD

Other versions of this model

3 more in the same range

Questions about this item

Does the AGI TF138 256GB card draw enough power to heat up or make noise during all-day recording?

The card is a passive microSDXC device with no moving parts, so it produces no audible noise and negligible heat during continuous read or write operations at up to 98 MB/s read and 70 MB/s write.

What host device features are required for the AGI TF138 to deliver its rated U3 and V30 speeds?

The host must support UHS-I Class 10 and the U3 video speed class; the included SD adapter lets you use it in full-size SD slots that meet those specifications.

Will the AGI TF138 work reliably in an older camera that only supports Class 10 or U1 cards?

Yes, the card is backward compatible with Class 10 and U1 hosts, though sustained write speeds will be limited to the older device's maximum capability.

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