SDHC Vs SDXC Memory Cards: Top Comparison


Tons of times you may have heard about the terms SD, SDHC, and SDXC. You may also sometimes get confused about the exact difference among SDHC Vs SDXC memory cards and which one is best for your needs. You are not alone mate! There are lots of people facing the same, and that includes me too! So I started searching the web and found an amazing write up of speed class differences on the SanDisk website. It really provided some universal, crystal clear info and removed my doubts. I then decided to write this article to help out other enthusiasts like me. Let’s go ahead and check the top comparison of these both!

sdhc vs sdxc memory cards

SDHC Vs SDXC Memory Cards

Before going to SDHC Vs SDXC, you should know about SD (Secure Digital) cards. Until the time, SD memory cards were most favorites for storing pictures, files, music, videos, and other favorite data. SD cards are used in mobiles, tablets, DSLR cameras, and other compatible devices. Such cards come with a small lock to secure your data from unwanted and mistaken erase. Typically, an SD card comes with the storage capacity of 2GB.

With the increase in data storage, security and faster speed requirements, the capacity of SD cards grown to SDHC and SDXC formats.

SDHC memory cards

SDHC stands for Secure Digital High Capacity. Due to its high storage capacity, it is one of the most popular removable memory cards for DSLR cameras and camcorders. SDHC cards generally have the storage capacity from 4GB to 32GB. This increased capacity allows you to store more data without worrying about the space. SDHC memory cards are compatible with almost all of the latest devices which store data on external cards.

SDXC memory cards

SDXC stands for Secure Digital Extended Capacity. When SDHC cards are not sufficient, people use SDXC cards. For example, if you want to store high-definition videos and images, then you need a high-storage device and SDXC memory card is the best option for that. Such types of external storage cards come with the storage capacity from 64GB to 2TB.


Though the both SDXC and SDHC are similar in terms of functionality, there are some significant differences between them.

  • One of the most major differences between SDHC and SDXC is their capacity. The SDHC has an upper limit of 32GB which was quickly surpassed by SDXC cards in just a few years with an upper limit of 2 Terabytes.
  • Another noticeable difference is speed. An SDHC card has a maximum transfer speed of 12.5Mbps while an SDXC card can go up to 104Mbps speed.
  • Both these types of storage drive are electrically compatible, but their formatting is different. SDHC uses FAT32 format and SDXC uses exFAT format to read and write data.
  • Another significant difference is size. SDXC memory cards are currently available only in standard size while the SDHC memory cards are available in three different sizes; standard, mini, and micro.

Micro SDHC Vs SDXC compatibility

One of the most common questions about these memory cards is that whether they are compatible with the older devices or not and what are the chances of new devices accept the older formats. Let me provide you answers to these. Maybe your older devices support the SDHC and SDXC memory cards, but you will not get benefited from their speed class and transfer rates. Most of the modern cameras, camcorders, mobiles, laptops, etc. devices support the latest formats of SDXC and SDHC, so you need not worry if you have a device a couple of years old. If your device supports an SDXC memory card, then it will be sure except the older SDHC and SD cards.

Take a quick look at the comparison table of SDXC Vs SDHC Vs SD memory cards below:

Storage Capacity 64GB-2TB 4GB-32GB 128MB-2GB
Transfer Speed 104Mbps 12.5Mbps 4Mbps
File Format exFAT FAT32 FAT16

Which memory card is right for you, SDHC or SDXC?

If you are using a DSLR, camcorder, mobile, and other similar devices, then you can go with the SDHC card. If you want to increase the storage capacity, you can buy multiple SDHC cards which will also help to secure your data. And if you want a super high transfer speed on your high-end digital camera, then you can go with SDXC memory cards. Just make sure to check the class, speed rate, storage capacity and your device compatibility before you buy an external storage device.


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