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Small black microSDXC card labelled AGI TF138 512GB with bundled full-size SD adapter

AGI

AGI TF138 512GB MicroSDXC Memory Card C10 U3 V30 A2 98/70 MBs

SKU CH-ERAF-42SHA

512 GB microSDXC card with V30 and A2 ratings, delivering 98 MB/s read and 70 MB/s write speeds for apps and video

  • Total capacity512 GB
  • Memory card formatMicroSD
  • Speed classV30
  • Max read speed98 MBs
  • Write throughput70 MBs
  • Product typeMicroSDXC

Capacity 512GB

  • 512 GB capacity stores extensive media libraries
  • 98 MB/s read speed enables rapid file transfers
  • 70 MB/s write speed supports continuous 4K capture
  • A2 rating accelerates app loading from the card
  • V30 class guarantees sustained 30 MB/s video recording

Capacity and class

The AGI TF138 is a 512 GB microSDXC card rated U3, V30 and A2. It targets users who need high-capacity removable storage for smartphones, tablets, cameras and other compatible devices. The A2 rating means it is optimised for running applications directly from the card.

Speed and headroom

Sequential read reaches 98 MB/s and write reaches 70 MB/s, with a sustained V30 minimum of 30 MB/s for video recording. This handles 4K capture and app workloads comfortably, but sustained write-heavy tasks beyond the V30 threshold will hit the card's ceiling.

Build integration

The card ships with an SD adapter for use in full-size slots. Buyers must verify that their host device supports 512 GB capacities, as older hardware limited to 64 GB or 128 GB will not recognise the card. Actual usable space is lower than the labelled capacity due to formatting and measurement differences.

How it compares

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

Price $100.99
Pricier than about 72% of the 1,947 comparable items (median $46.99).
Total capacity 512 GB
Higher than about 90% of the 1,132 comparable items (median 64 GB).
Price per TB $197.25 per TB
Cheaper than about 81% of the 901 comparable items (median $374.69 per TB).

Specifications

Product
Brand nameAGI
Product lineTF138
Model name128G
Total capacity512 GB
Product typeMicroSDXC
Performance
Speed classV30
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

Will this 512 GB MicroSDXC card work in my older camera that only supports up to 64 GB?

No — the compatibility reminder states that a device limited to 64 GB may not recognise capacities above 128 GB, so this 512 GB card would not be usable in that camera.

How can I verify the card is delivering the rated 98 MB/s read and 70 MB/s write speeds after I set it up?

Run a benchmark tool such as CrystalDiskMark or the built-in speed test in your camera or phone; sustained sequential results close to 98 MB/s read and 70 MB/s write confirm the card is performing to spec.

Does the package include the SD adapter so I can use the card in a full-size SD slot, or do I need to buy one separately?

The supplier title confirms an SD card adapter is accompanied, so the adapter is in the box and no separate purchase is required.

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