• 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, 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, 45MB/s write

    Use : Action Cameras and Drones

    Class Class 10 UHS-I

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

    Use : Industrial Applications

    Class UHS-I U3 90R/80W

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

    Use : burst mode photos, 4K Video

    Class Mobility Kit

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

    Use : works with multiple devices

  • 4MB/s+
    45MB/s read, 10MB/s write
    90MB/s read, 45MB/s write
    90MB/s read, 45MB/s write
    Up to 90MB/s read,
    45MB/s write
    90MB/s, 80MB/s write
    up to 45MB/s read, 10MB/s write
  • point & shoot photos, standard video
    photos, HD video
    burst mode photos, HD & 3D Video
    Action Cameras and Drones
    Industrial Applications
    burst mode photos, 4K Video
    works with multiple devices
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 19 popular types of Flash memory cards without needing adapters or a power cable. More


Kingston's Co-Logo and Customisation Programme 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. These capacities only come in a Class 4, meaning they have a data transfer rate of 4MB/s

  4. This capacity comes in a Class 10, meaning they have a data transfer rate of 10MB/s

  5. SD adapter not included with SDC4/4GBSP, SDC4/8GBSP, SDC4/16GBSP, SDC4/32GBSP, SDC10/16GBSP, SDC10/32GBSP, SDXC10/64GBSP.

  6. MSPD (memory stick pro duo) and MS Pro HG Duo are trademarks and registered trademarks of Sony Corporation. Kingston is not affiliated with Sony Corporation. Other names and brands may be claimed as the property of others.

  7. 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 the standard daily consumer usage. For more information on intended use, please refer to the Flash Memory Guide at kingston.com/flashguide.

NOTE: Although identical in size to today's standard microSD card, microSDHC/SDXC cards are recognised only by microSDHC/SDXC host devices. They can be used as full-size SDHC/SDXC cards when used with an adapter. To ensure compatibility, look for the microSDHC/SDXC or SDHC/SDXC logo on your phone, PDA or camera.

Product specifications subject to change without notice.

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