Memory Cards

SDXC memory cards

Written by Gail Bjork

Secure Digital Extended Capacity cards will be able to store up to two terabytes of data! But these high speed, high capacity SD cards are high priced and only work with host products.

SDXC memory cardSDXC (eXtended Capacity) memory cards store data more than 32 GB and up to two terabytes and have read/write speeds to 104MB per second. According to the SD Association, some SDXC cards will be able to store more than 17,000 photos, 4,000 RAW images, 100 High Definition videos, or 60 hours of HD recording.

This new technology will eventually offer speeds up to 300 MB per second and can be used in SDXC-compatible consumer electronic devices such as digital and video cameras and mobile phones.

Only use SDXC Memory Cards in SDXC host products

It’s important to note that SDXC cards should not be used in non-compatible host products. According to the SD Association:

  • SDXC memory cards can be used only with SDXC host products.
  • SDXC host products can use SD, SDHC and SDXC memory cards.
  • SDHC memory cards can be used with SDHC and SDXC host products.
  • SDHC host products can use both SD and SDHC memory cards.

SDXC host productsThe association also offers this warning:

“If an SDXC memory card is inserted into a PC or a host product that does not support SDXC memory cards, a message may prompt you to format the card. Do not format the SDXC memory card in a non-compatible host product; it will erase the data on the SDXC memory card and format the card for a different file system that will no longer work with SDXC host products.”

More information about SDXC memory cards

High speed, high capacity, high cost

If you’re an early adopter to this technology, prepare to pay several hundred dollars for a SDXC memory card.

About the author

Gail Bjork

Gail Bjork, who is passionate about digital photography, is the owner and editor of Digicamhelp.Gail is the author of three illustrated ebooks about digital photography. A number of her photos and digital photography related articles appear at other websites.In 2006, a series of her photos, People in the Louvre, were exhibited at the Underground Photo Gallery
in Iisalmi Finland. Eight of her photos taken in the Florida scrub are on permanent exhibition at Parrish Medical Center in Titusville, Florida.Gail served twelve years as an elected member of The School Board of Palm Beach County, Florida, one of the largest school districts in the U.S. She has also been the editor of a small town newspaper and a free-lance writer. Gail and her husband owned and ran several small businesses.

1 Comment

  • Any memory card that is rated using the “Class” system is a newer SDHC card. The older cards were rated with “X-factor” which many found misleading. The X speed measurement was the maximum possible write speed while the Class speed measurement is the maximum sustainable write speed. It like saying that my car can hit a top speed of 90 MPH (X-speed) but for cruising over long periods of time the max speed is 75 MPH (Class speed).