Which is Better SDHC or SDXC?

which type of cards is better

by Alex Gustman

Updated: May 6, 2021

All memory cards indicate the generation of the format that allows you to determine the compatibility of the drive before installing it in a digital device. This article will tell what the difference between the formats is and which format is better.

What is the difference between SDXC and SDHC?

Differences in the amount of memory supported. The maximum capacity of SDXC cards is 2 TB, and SDHC is only 32 GB. A total of 5 generations of SD cards are accepted:

  • SD 1.0.
  • SD 1.1.
  • SDHC.
  • SDXC.
  • SDUC.

SD 1.0 is the first generation of the Secure Digital standard, used in cards up to 2 GB in size.

SD 1.1 is a further development of the standard, used in 4 GB cards.

SDHC. The abbreviation stands for Secure Digital High Capacity. It is marked on drives with a capacity of 8-32 GB.

32 gigabyte drive

SDXC. Secure Digital eXtended Capacity Standard Specified on drives with a capacity of 64 GB or more, up to 2 TB.

SDUC. Secure Digital Ultra Capacity Standard The maximum capacity of SDUC drives is 128 TB.

The most advanced standard is SD Express, which supports the PCI Express 3.0 interface and the NVMe 1.3 protocol, which provides the highest data transfer rate among all SD cards. In total, 3 versions of the standard are accepted: SDHC 1 express, SDXC 1 express and SDUC 1 express. The maximum capacity of each type of card is 32 GB, 2 and 128 TB, respectively.

Can I use the SD card in the SDXC slot?

Each generation of SD cards retains compatibility with previous versions. Therefore, the device with support for SDXC cards works properly with cards of previous generations – SDHC, SD 1.1 and 1.0. But cards with a modern standard in incompatible devices do not work or function with certain restrictions.

Why do I need an SDXC card?

The quantity and quality of content is growing every year, as are the storage requirements. Therefore, 32 GB drives are not enough to cover the basic needs of most users. As a result, owners of digital devices prefer 64, 128 and 256 GB of media produced under the SDXC standard.  

64 gigabyte drive

Which SDXC card is the fastest?

The fastest SanDisk maps in the Extreme PRO series. The maximum write speed of such drives reaches 300 MB.

Which is better than SanDisk Extreme or Ultra?

The SanDisk Extreme series cards are superior to the Ultra series cards. The Extreme series is designed for use primarily in professional equipment – digital cameras or video cameras. Also, SanDisk Extreme cards are relevant in high-performance smartphones for running games and applications from the drive or shooting photos and videos in high resolution.

The SanDisk Ultra series cards are designed for use in tasks that are not demanding for speed or operating mode. The reduced price relative to the Extreme series promotes mass use in smartphones, tablets and digital cameras for basic tasks.

16 gigabyte drive sandisk ultra

Which is faster UHS 1 or UHS 3?

The UHS 3 protocol is faster. The minimum data transfer rate of UHS 3 is 30 MB / s, whereas UHS 1 is only 10 MB/s. In practice, the speed is usually higher, which is affected by the operating mode.


This article describes in detail what is better than SDHC or SDXC. The best option is an SDXC card due to the increased capacity relative to SDHC cards. In addition, SDXC cards have a greater variety of supported speed classes and, accordingly, usage scenarios.

What questions do you have? Leave messages in the comments below the article.

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About the author 

Alex Gustman

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