SanDisk Ultra Micro SD Card A1 C10 U1 – 32GB to 256GB

SanDisk Ultra Micro SD Card – High-Speed Storage for Every Device

Expand your device's storage with the SanDisk Ultra microSD Card, available in 32GB, 64GB, 128GB, and 256GB capacities. Rated Class 10 (C10), U1, and A1, this microSDXC card delivers fast, reliable read speeds ideal for capturing Full HD video, storing photos, running apps, and recording on the go.

Key Features

• A1 App Performance Class: Smooth app loading and responsive performance on Android smartphones and tablets.
• Class 10 / U1 Speed Rating: Consistent high-speed reads for Full HD (1080p) video recording and fast file transfers.
• Wide Compatibility: Works seamlessly with Android phones, tablets, dashcams, security cameras, Nintendo Switch, and interchangeable-lens cameras.
• Built Tough: Shockproof, waterproof, temperature-proof, and X-ray-proof — engineered to handle demanding environments.
• 24/7 Monitoring Ready: Stable and consistent performance for continuous HD security camera recording.
• microSDXC Form Factor: Compact TF/Micro SD format, easy to use with an included adapter where applicable.

Capacity Guide (Actual Formatted Capacity)

• 32GB ≈ 28–30 GB usable
• 64GB ≈ 58–60 GB usable
• 128GB ≈ 115–119 GB usable
• 256GB ≈ 230–238 GB usable

Note: Formatted capacity is slightly less than stated capacity due to file system overhead — this is standard across all flash memory products.

Speed Verification Tips

• Always use a quality USB 3.0 card reader to test and verify speed.
• Avoid low-quality card readers — they can artificially limit read/write speeds.
• Card speed may also vary depending on the host device, USB port type, and chosen capacity.

Compatible Devices

SanDisk Ultra microSD cards are certified to work with a wide range of devices, including:

• Android smartphones and tablets
• Dashcams and action cameras
• HD security and monitoring cameras
• Nintendo Switch gaming consoles
• Laptops and notebooks with microSD slots

Made in Mainland China.

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Learn more: EPA guidance on lithium-ion battery handling

Frequently Asked Questions

Q: Is the SanDisk Ultra microSD card compatible with the Nintendo Switch?

A: Yes! The SanDisk Ultra microSD card is fully compatible with the Nintendo Switch. Simply insert the card into the console's microSD slot to expand your game library storage. We recommend 64GB or higher for storing multiple game titles.

Q: What is the difference between A1, C10, and U1 ratings on this microSD card?

A: These ratings describe different performance benchmarks. Class 10 (C10) guarantees a minimum sequential write speed of 10 MB/s, ideal for Full HD video. U1 (UHS Speed Class 1) also ensures at least 10 MB/s for UHS-enabled devices. A1 (Application Performance Class 1) means the card meets minimum random read/write speeds required for running smartphone apps directly from the card.

Q: Why does my 64GB card show less than 64GB of available space?

A: This is completely normal for all flash memory products. Storage manufacturers measure capacity using 1GB = 1,000,000,000 bytes, while operating systems use 1GB = 1,073,741,824 bytes. Additionally, a small portion is reserved for the file system. A 64GB card will typically show approximately 58–60 GB of usable space on your device.

Q: Can I use this microSD card in a dashcam or security camera for continuous recording?

A: Yes, the SanDisk Ultra microSD is well-suited for dashcam and HD security camera use. Its stable Class 10 / U1 performance supports smooth continuous recording, and its durable, shockproof, waterproof construction makes it reliable for 24/7 monitoring setups.

Production & Packaging Notice

To maintain high stock availability and fast shipping times, our items are sourced from multiple verified manufacturing facilities. While the core quality, materials, and product specifications remain identical, you may notice slight variations in the packaging design, manufacturing origin, or the wording of the printed instructions.