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Transcend 300S 512GB microSDXC card with SD adapter

Transcend

Transcend 300S 512GB microSDXC UHS-I U3 V30 A1 Class 10 95MB/s memory card

SKU CH-DF1Q-2HWFS

High-capacity microSDXC card with UHS-I U3, V30 and A1 ratings for 4K video and fast app loading

  • TypeMicroSD
  • Speed Class RatingClass 10
  • 512 GB capacity stores more apps and media
  • UHS-I U3 and V30 ratings sustain 4K video capture
  • A1 class delivers 1,500 read IOPS and 500 write IOPS for faster app launches
  • Read speed up to 95 MB/s moves large files quickly
  • Write speed up to 45 MB/s keeps recording smooth

Designed for Android app storage

This microSDXC card targets Android users who want to run applications directly from removable storage. The A1 rating guarantees minimum random read of 1,500 IOPS and random write of 500 IOPS, so small data fragments load quickly and app launch times stay short. It also meets Class 10, U3 and V30 standards for sustained sequential performance.

512GB capacity with UHS-I speeds

The card offers 512GB of space and a UHS-I interface rated for up to 95MB/s read and 45MB/s write. These sequential speeds satisfy 4K Ultra HD video recording requirements, while the A1 random‑IOPS figures decide whether the card can keep pace with heavy app workloads. Buyers who need higher sustained write throughput or larger capacities should look elsewhere.

Simple drop‑in installation

Insert the card into the device slot or the bundled full‑size SD adapter; no drivers or formatting tools are required. The most common issue is using a legacy reader that cannot negotiate UHS‑I speeds, which caps transfers well below the rated 95MB/s. Verify that the host device supports microSDXC and the UHS‑I bus before purchase.

Highlights

  • 512 GB capacity stores more apps and media
  • UHS-I U3 and V30 ratings sustain 4K video capture
  • A1 class delivers 1,500 read IOPS and 500 write IOPS for faster app launches
  • Read speed up to 95 MB/s moves large files quickly
  • Write speed up to 45 MB/s keeps recording smooth

Specifications

TypeMicroSD
Speed Class RatingClass 10

Questions about this item

How does the 95 MB/s read speed work in a real device?

The card delivers up to 95 MB/s sequential read and 45 MB/s write, while the A1 rating guarantees at least 1,500 random read IOPS and 500 random write IOPS for faster app launches on Android.

What does UHS-I U3 V30 mean for actual transfer limits?

UHS-I U3 and V30 certify a minimum sustained write of 30 MB/s, enabling 4K video recording; the card reaches 95 MB/s read and 45 MB/s write within the UHS-I interface.

What does the card need to fit and mount in my hardware?

It uses the microSDXC form factor and includes a full-size SD adapter, so it fits any microSDXC or SDXC slot that supports 512 GB capacity.

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