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Ten small black microSD cards with matching SD adapters

Transcend

Transcend 300S 256GB microSDXC UHS-I V30 10-pack

SKU CH-DPQD-0N8QA

Ten microSDXC cards, each 256 GB with V30 and U3 ratings, up to 95 MB/s read and 40 MB/s write, plus SD adapters

  • TypemicroSDXC
  • V30 rating guarantees 30 MB/s sustained writes for 4K video
  • Up to 95 MB/s read speeds accelerate file transfers and app loads
  • Shockproof, waterproof, temperature-proof and X-ray-proof for harsh environments
  • Includes SD adapter for use in standard SD card slots
  • Pack of 10 cards each delivering 256 GB capacity

256 GB microSDXC 10-pack

This bundle supplies ten Transcend 300S microSDXC cards, each with 256 GB capacity and an included SD adapter. They are built for smartphones, tablets and cameras that accept microSDXC media and need reliable local storage for apps and media files. The V30 rating guarantees a minimum sustained write speed of 30 MB/s, making the cards suitable for Full HD and 4K video capture.

Sustained write performance

Under continuous recording the cards maintain at least 30 MB/s write throughput thanks to the V30 and U3 classifications. Maximum sequential write reaches 40 MB/s while read speeds peak at 95 MB/s, so extended video shoots or burst photography sessions do not stall once the cache fills. Performance will drop to the host device's lowest supported speed class if that device does not meet UHS-I V30 requirements.

Compatibility checklist

Verify that your device explicitly supports microSDXC cards up to 256 GB and the UHS-I bus before ordering. If the host only guarantees U1 or Class 10 speeds, the card will still function but write performance will be limited to 10 MB/s. The supplied SD adapter allows use in full-size SD slots, but the same speed constraints apply to the host device's card reader.

Highlights

  • V30 rating guarantees 30 MB/s sustained writes for 4K video
  • Up to 95 MB/s read speeds accelerate file transfers and app loads
  • Shockproof, waterproof, temperature-proof and X-ray-proof for harsh environments
  • Includes SD adapter for use in standard SD card slots
  • Pack of 10 cards each delivering 256 GB capacity

Specifications

TypemicroSDXC

Questions about this item

Does the card generate noticeable heat or draw extra power when recording 4K video continuously all day?

The microSDXC card itself produces no measurable heat and consumes negligible power; thermal load and battery draw come from the host device, not the card.

What device slot or adapter do I already need so these 10 cards can be used immediately?

Each card requires a microSDXC slot; an SD adapter is included in every pack so you can also use standard SD card readers or camera slots.

Will the V30 speed class work properly in my older camera that only supports U1 or Class 10?

Yes, the card automatically falls back to the device's maximum supported bus and speed class, so it will operate at U1 or Class 10 minimum write speeds of 10 MB/s.

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