Lexar microSDXC 633x UHS-I/A1/U3/10 R100/W45MB (V30) 256GB

Lexar microSDXC 633x UHS-I/A1/U3/10 R100/W45MB (V30) 256GB – Up to 95MB/s read and up to 45MB/s write

Capture high-quality photos and video with the Lexar microSDXC 633x 256GB card. Designed for sports camcorders, tablets, and smartphones, this card supports Full-HD, 3D, and 4K video recording while offering UHS-I performance for fast transfers and reliable storage.

Key benefits and use cases

• Premium memory solution for sports camcorders, tablets, and smartphones — use it when you need reliable storage for active shooting and mobile devices.
• Quickly captures, stores, plays back, and transfers media files — it handles 1080p Full-HD, 3D, and 4K video formats commonly used by consumer and action cameras.
• Leverages UHS-I technology for high-speed performance — the 633x rating corresponds to up to 95MB/s read speed, which helps shorten transfer times to your computer or device.
• Example storage capacity figures provided by the manufacturer — these help illustrate potential capacity but will vary by device and file settings.

Performance and compatibility

The Lexar 633x microSDXC card uses UHS-I technology and is part of the Class 10 family. For the 256GB capacity specifically, the card is listed as U3, A1, V30, which indicates suitability for sustained video recording and app performance on compatible devices. Read speeds can reach up to 95MB/s, while write speeds for 64GB–256GB capacities are specified up to 45MB/s.

Manufacturer example capacity notes

The manufacturer provides example figures to illustrate possible storage: based on a 128GB card, the examples include more than 15 hours of HD video, 33,000 photos, or 28,000 songs. Keep in mind these figures are examples and will vary depending on camera or device model, image resolution and compression, audio bitrate, usable capacity, and bundled software.

Capacities and speed options

Notes on measured speeds and capacity examples

*Up to 95MB/s read transfer; write speeds are lower. Speeds are based on internal testing; actual performance may vary. The "x" rating equals 150KB/s.

**The example storage figures (hours of video, number of photos or songs) are based on a 128GB capacity using 12-megapixel JPEG images, 128-kbps MP3 audio, and HD video encoded at 15 Mbps. Actual numbers will vary with camera or device model, file format, resolution, compression, usable capacity, and bundled software.

Frequently asked questions

Question: Is this card suitable for recording 4K video?
Answer: Yes. The product description specifically states the card can capture 4K video. In the 64GB–256GB range, the card is rated U3 and V30, which supports sustained write performance suitable for many 4K recording workflows on compatible devices.

Question: Which devices are best matched to this card?
Answer: The card is designed for sports camcorders, tablets, and smartphones. Use it wherever you need removable, high-capacity storage for Full-HD, 3D, or 4K media files on compatible devices.

Question: What should I expect for transfer speeds in real use?
Answer: The card is specified for up to 95MB/s read; however, the manufacturer notes that write speeds are lower and actual performance depends on the device, card reader, and test conditions. Therefore, expect variation in real-world transfer and recording speeds.

Question: How much media can this card hold?
Answer: The manufacturer provides example figures based on a 128GB card: more than 15 hours of HD video, 33,000 photos, or 28,000 songs. These are illustrative values; actual capacity for the 256GB card and your media will vary by resolution, compression, and device.

Question: Can I run apps from this microSD card?
Answer: For the 64GB–256GB capacities, the card carries the A1 app performance class, which indicates it meets baseline random read/write performance suitable for running apps on compatible Android devices. Performance will still depend on the host device.