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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

  • Card typeMicroSD
  • TypemicroSDXC
  • Capacity512GB
  • Speed Class RatingV30
  • Read Speed98 MBs
  • Write Speed70 MBs

Capacity 512GB

Struck-through versions exist but are not stocked here.

  • 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.

Highlights

  • 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

Specifications

BrandAGI
Card typeMicroSD
SeriesTF138
Model128G
TypemicroSDXC
Capacity512GB
Speed Class RatingV30
Read Speed98 MBs
Write Speed70 MBs

Other versions of this model

3 more in the same range

Same family, different memory, cooler or clock — compare before you commit.

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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