• Class Class 4

    Speed : 4MB/s+

    Use : point & shoot photos,
    standard video

    Class Class 10 UHS-I

    Speed : 45MB/s read, 10MB/s write

    Use : photos, full HD video

    Class Class 10 UHS-I

    Speed : 90MB/s read, 45MB/s write

    Use : burst mode photos,
    HD & 3D video

    Class UHS-I Speed Class 3 (U3)

    Speed : 90MB/s read, 80MB/s write

    Use : burst mode photos,
    4K2K video

  • 4MB/s+
    45MB/s read, 10MB/s write
    90MB/s read, 45MB/s write
    90MB/s read, 80MB/s write
  • point & shoot photos,
    standard video
    photos, full HD video
    burst mode photos,
    HD & 3D video
    burst mode photos,
    4K2K video
Learn More
Understanding speed classes

The SD card association defines card speeds using two terms: Speed Class and UHS Speed Class.

  • Speed class is the original rating used and the number defines the card speed; 4 for 4MB/s, 6 for 6MB/s. etc.

  • UHS (Ultra High Speed) uses minimum write speeds to differentiate the cards; UHS-I Speed Class 1 has a minimum write speed of 10MB/s while UHS-I Speed Class 3 has a minimum write speed of 30MB/s.

What the logos mean

It’s easy to select a card that matches the interface and speed class required by the host device, such as a camera or camcorder.

SD card
When you need a faster card

Here are some signs you may need to upgrade your card:

  • Long buffering – when you press the shutter and the camera takes the shot but then it freezes until the data is fully written to the card.

  • Corrupted video – video cameras might produce corrupted video files if the card speed is too slow or the camera may downgrade the video to match the speed of the card. This could turn full 1080p HD video into a video with much lower resolution.

  • Shortened clips – when a camera has a higher writing speed than the Flash card, the camera will pause and the video clip will abruptly end once the speed limit of the card is reached.

  • Burst shooting – many cameras have a burst mode feature where one press produces a repeated series of photographs; this allows users to capture fast-moving events or subjects like pets and children. If the card writing speed is too slow, burst mode setting will not work.

Usage Speed Classes UHS-I Speed Classes
Class 4 Class 10 UHS-I Class 1 UHS-I Class 3
Still images, photos and low-resolution video dot dot dot dot
Full HD videos dot dot dot
Cinema-quality full HD (1080p), 3D video dot dot
4K, full 1080p HD video and burst-mode action photography dot
MobileLite Gen 4

A compact, multifunctional USB 3.0 card reader that will become an essential part of your mobile gear. More

USB 3.0 Media Reader

Supports popular types of Flash memory cards without needing adapters or a power cable. More


Kingston's Co-Logo and Customization Program is available for selected USB Flash drives and Flash cards. Minimum quantities required per order; contact your Kingston representative for details. More

  1. Some of the listed capacity on a Flash storage device is used for formatting and other functions and thus is not available for data storage. As such, the actual available capacity for data storage is less than what is listed on the products. For more information, go to Kingston's Flash Memory Guide.

  2. Speed may vary due to host and device configuration.

  3. 2GB, 16GB, 32GB and 64GB cards may require updated device drivers. Consult the device documentation for requirements.

  4. Host and Card Compatibility SDXC cards use the same physical format as SD or SDHC cards but can only be used with SDXC host products such as digital cameras or camcorders. They are not backwards compatible with SDHC or standard SD interfaces. To confirm the host product is SDXC compatible, locate an SDXC logo on the host product, packaging, instruction manual or other manufacturer's information. When using SDXC cards for file transfer with Windows® operating systems, the exFAT file system is available on Microsoft Windows 7, Windows Vista® (SP1 or later) and Windows XP (SP2 or later with exFAT update).

  5. Actual recording time will vary based upon camera model, selected resolution, compression settings and the content being recorded. Some host devices may not support all of the Flash storage capacities listed. Consult your device's owner's manual for supported capacities.

  6. Approximate number of JPEG (compressed file) pictures. JPEG file sizes vary based upon camera model and internal file size and compression settings, as well as user-selected resolution and compression mode settings. In addition, JPEG compression will result in different file sizes based upon picture complexity. Some host devices may not support all of the Flash storage capacities listed. Consult your device's owner's manual for supported capacities. Product specifications subject to change without notice.

  7. These Class 10 cards are meant for HD video recording but do not support some simultaneous video and still capture features.

  8. Kingston Flash Cards are designed and tested for compatibility with consumer-grade market products. It is recommended that you contact Kingston directly for any OEM opportunities or special use applications that are beyond standard daily consumer usage. For more information on intended use, please refer to the Flash Memory Guide at kingston.com/flashguide

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