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Small rectangular microSDXC card with black plastic body and gold contact pins

SAMSUNG

SAMSUNG P9 Express microSDXC Memory Card 512GB

SKU CH-3B6J-A7R9V

A microSDXC card with up to 800 MB/s read speed, PCIe and NVMe 1.3 interface, U3 V30 A1 ratings, and 512 GB capacity for Nintendo Switch 2 and other devices

Capacity 512GB

  • Up to 800 MB/s read speed accelerates game loading
  • Dynamic Thermal Guard maintains steady performance during extended sessions
  • 512 GB capacity stores large game libraries and downloadable content
  • NVMe 1.3 interface enables PCIe Gen3.0x1 high-speed data transfer
  • U3 V30 A1 ratings guarantee sustained 30 MB/s minimum write for 4K recording

512GB microSDXC for gaming consoles

The Samsung P9 Express microSDXC card provides 512GB of storage for devices with a microSDXC slot, including gaming consoles such as Nintendo Switch 2, mobile phones, tablets, action cameras, drones and laptops. It uses Samsung V-NAND TLC flash and carries U3, V30 and A1 speed class ratings. The card targets users who need high-capacity removable storage for games, media and applications.

PCIe Gen3.0x1 NVMe 1.3 with Dynamic Thermal Guard

The card communicates over a PCIe Gen3.0x1 interface with NVMe 1.3 protocol and conforms to the SD 7.1 specification. Dynamic Thermal Guard monitors temperature and regulates performance to keep the card within optimal thermal limits during typical use. This thermal management helps maintain consistent operation without requiring active cooling from the host device.

Sustained throughput up to 800 MB/s for long

Sequential read speeds reach up to 800 MB/s, which is up to four times faster than UHS-I microSD cards, reducing installation, update and load times during extended gameplay. Dynamic Thermal Guard continues to manage heat under sustained workloads, preventing thermal throttling that could interrupt long recording or gaming sessions. The 512GB capacity accommodates multiple large titles, downloadable content and captured replays on a single card.

How it compares

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

Price $145.99
Pricier than about 81% of the 1,947 comparable items (median $46.99).

Specifications

No published specifications for this item yet.

Other versions of this model

5 more in the same range

Questions about this item

How do I install the microSD Express card and what is the common mistake?

Insert the card label-side up into a microSDXC slot until it clicks; the mistake is using a UHS-I-only slot that cannot enable PCIe Gen3.0x1 speeds.

What maintenance or replacement will the 512GB card need later?

No scheduled maintenance; replace only if the Samsung V-NAND TLC wears out or the card becomes physically damaged.

What limit appears first under sustained heavy use?

Dynamic Thermal Guard throttles performance to keep temperatures safe once the card reaches its thermal threshold.

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