SDHC vs SDXC: The Ultimate Comparison by Experts in 2021

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In today’s technologically advanced era, we all can surely agree on the fact that we produce and consume vast amounts of data. Every Individual over his lifetime has a lot of memories and information collected which needs to be stored securely and within reach. That’s what the SD cards are for. SD stands for Security Digital cards which help you in storing all your information together in one place. It is used generally in cameras and phones to expand their storage capacity.

In this article, we’ll talk about SDHC and SDXC memory cards which are better and more refined versions of the normal memory cards. They enable us to transfer the data faster and have more features that make them suitable for more professional use.


SDHC stands for Secure Digital High Capacity. The format of the SD card was introduced in January 2006 and brought new improvements with it such as improved storage capacity and mandatory support for the FAT32 file type. It is identical both electrically and physically to its standard SD cards.

In its 2.0 version, it supports SD cards with up to 32 GB. This version allows High-speed Bus mode for both SDSC and SDHC to produce a Standards Speed clock to 25MB/s. It uses a 3-speed class system which enables faster transferring of data and makes it more preferred among others.

Secure Digital High Capacity itself explains one of its main preferred and distinguished features which is that it has a high capacity which automatically means more storage space for all of your personal and professional data which can be files, music, pictures, or any other type of data.

A large of cameras and camcorders are also compatible with it which makes them one of the most preferred and used removable SD cards for cameras and camcorders worldwide.

Before the release of Windows 7, all the operating system requires patch service to have access to SDHC cards. Moreover, some of the older host devices do not recognize SDHC cards but a firmware upgrade could help solve this problem for some devices.


SDXC stands for Secure Digital eXtended Capacity. The SDXC family was introduced in January 2009, with the specialty of offering a storage capacity of up to 2 TB. The most attractive feature is that it helps in handling large volumes of data with files extending capacity up to 4 GB.

It has high-speed transferring of data up to 300MB/s. The default file type of exFAT is formatted with an SDXC card. Because of their high speed of transferring data and ability to contain a large volume of data, they are more preferred for saving video files.

SDXC cards are not compatible with host devices that take only SD cards or SDHC cards. But usually, devices after the year 2010 will be compatible with SDXC cards.


We can compare both SDHC and SDXC cards on different parameters that will help you recognize the strengths and various capabilities of both of these cards. Also, it will help you to find the better card to suit your purpose!

Storage CapacityUp to 32GBUp to 10 TB
Speed10 MB/s300MB/s
File SystemFAT32 file SystemexFAT file system
PriceComparatively lesserHigher
  • Speed

 The speed capacity of the memory card is a very important component to consider as video recording or capturing data such as pictures or videos of high resolution should be done smoothly without any glitches in a way that no data is lost.

We have previously spoken about the speed class of the memory cards. Let’s talk about it a bit more to make you understand how the cards differ based on it. The speed class shows the minimum range of the writing performance the card has to record standard and high-resolution videos. They are classified only by numbers which are 2, 4, 6, and 10.

Speed class 2 offers to speed up to 2 MB/s wild speed classes 4 6 and 10 offer speed up to 10 MB/s

While recording videos with cameras of high definition it is suggested to use SD cards with a speed class of either 4 or 6 to maintain the speed of transferring high-definition recording without any loss of data or glitches.

When we talk about the two memory cards at discussing your that is SDHC and SDXC and compare them based on the speed capacity, find that SDHC’s speed capacity is up to 10 MB/s various SDXC offers speed capacity up to 300 MB per second. It is clearly shown that the letter that is SDXC is faster than the prior by a large range. This can also be cited as one of the reasons why SDXC cards are more preferred while recording high-resolution videos.

  • File system

We have already mentioned in the introduction of both the memory cards that the memory card uses the FAT32 file system ware is SDXC memory card uses the exFAT system. Both of these files’ systems are compatible through the SD card functions and storage capacity. The difference here is important because of this file system SDXC cards are not compatible with some host devices that only take either SDHC card or SD card.

  • Storage capacity

The whole purpose of an SD card is to store additional data of the device. Therefore, the most important factor to consider while selecting a memory card is to see the storage space that it offers. The HDFC cards have capacities of 4, 8, 16, and 32GB. The maximum capacity for an SDHC card is 32GB whereas the maximum storage capacity for an SDXC card is up to 10 TB. From this also we can realize that for recording videos higher definition which requires more space using SDXC memory cards would be sensible.

  • Price

Anybody who is buying something keeps price as one of the most important criteria of judgment. Since the SDXC card has more features it is available at a slightly higher price than the SDHC card.

Important Points to Remember

Using SDHC or SDXC cards or as the matter of fact any other memory card, there are a few things which you need to keep in mind and would help you in using them with utmost ease.

  • In case some files or images needed to be deleted it is suggested to do that while using a computer or a laptop and not do it directly on the device in which you’re recording; that maybe your camera or the camcorder. It is so because this would eventually shorten the life of the card which will not be beneficial to you.
  • Removing the card from the device while the camera is using it is not advisable. It is better to switch it off first as your card will probably need time to write all the data that has been recorded in burst mode.
  • It is advised to keep the card clean and in dry conditions and not expose it to extreme temperatures.
  • If by chance some of the images get deleted or there is a card error message that is being displayed, it is advisable to stop using the card immediately as there is a risk of overwriting other images if the card is still in use.
  • The SDXC or the SD HC cards perform best when they are reformatted periodically.

There are multitudes of memory cards in the market and people choose the one which aligns best with their needs. There are various types of memory cards with different features but here, in this article, we have thrown light on two of those cards which are high in demand. We hope that this article has been beneficial to you and has provided you with adequate knowledge to choose the one that has all the features and fits your requirements providing you with maximum benefit.

Frequently Asked Questions
What is the lifetime of SD cards?

The period of the lifetime of SD cards depends on the usage of the card and how well you take care of it. Usually, most SD cards have a life of up to 5 years or even more but there are few things that you can do that would help in increasing its lifetime. The frequency of erasing the data from the SD cards should be less as this type of activity could contribute to shortening the lifetime of memory cards.

Which one between SDHC or SDXC is the better card?

From this article, we have shown that each of the memory cards has its own advantages and disadvantages. We would suggest that if you want to choose a specific memory card then choose the one which aligns with your requirements. In case you need to shoot videos in high definition and need it for large capacity then we suggest that an SDXC card will be a better option for you as it would help you to save large volumes of data and also provide a higher transferring rate of the HD recording.

Can the SDXC slot read SDHC?

Yes, the SDXC slot in the computer device assists to read both the SDHC card and SD card. SDXC cards need an exFAT file system in the computer device so that it can read that card, so even an SDXC card would work in an SDHC card reader if the exFAT file system is supported by the computer’s operating system.

Do the memory cards support videos in 4K?

Yes, the aforementioned memory cards both SDHC and SDXC records videos in 4k.