SD MMC vs. SDXC

Attribute	SD MMC	SDXC
Capacity	Up to 4GB	Up to 2TB
Speed Class	Class 2-10	Class 2-10, UHS-I, UHS-II, UHS-III
File System	FAT12, FAT16, FAT32	FAT32, exFAT
Compatibility	Compatible with SDHC devices	Compatible with SDHC and SDXC devices

Introduction

When it comes to choosing a memory card for your digital camera, smartphone, or other electronic devices, there are several options available in the market. Two popular choices are SD MMC (Secure Digital MultiMedia Card) and SDXC (Secure Digital eXtended Capacity) cards. Both types of memory cards have their own set of attributes that make them suitable for different purposes. In this article, we will compare the attributes of SD MMC and SDXC memory cards to help you make an informed decision.

Capacity

One of the key differences between SD MMC and SDXC memory cards is their storage capacity. SD MMC cards typically have a maximum capacity of 2GB, making them suitable for storing smaller files such as photos and music. On the other hand, SDXC cards have a much higher capacity, with some models offering up to 2TB of storage space. This makes SDXC cards ideal for storing large files such as high-definition videos and RAW image files.

Speed

Another important factor to consider when choosing a memory card is its speed. SD MMC cards are known for their slower read and write speeds compared to SDXC cards. This means that transferring files to and from an SD MMC card may take longer, especially when dealing with large files. On the other hand, SDXC cards are designed to offer faster read and write speeds, making them ideal for tasks that require quick data transfer, such as recording 4K videos or shooting in burst mode.

Compatibility

When it comes to compatibility, SD MMC cards are more limited compared to SDXC cards. SD MMC cards are only compatible with devices that support the MMC standard, which may be less common in newer electronic devices. On the other hand, SDXC cards are designed to be backward compatible with devices that support the SD standard, making them a more versatile option for a wide range of devices. Additionally, some SDXC cards come with a UHS-I or UHS-II interface, which further enhances their compatibility with high-speed devices.

File System

SD MMC and SDXC memory cards also differ in terms of their file system. SD MMC cards typically use the FAT16 file system, which has limitations in terms of file size and storage capacity. This can be a drawback when dealing with large files or when using the memory card with devices that require a different file system. On the other hand, SDXC cards use the exFAT file system, which offers better support for larger files and higher storage capacities. This makes SDXC cards a more suitable choice for modern devices that require a more advanced file system.

Price

Price is another factor to consider when choosing between SD MMC and SDXC memory cards. SD MMC cards are generally more affordable compared to SDXC cards, making them a budget-friendly option for users who do not require a high storage capacity or fast data transfer speeds. On the other hand, SDXC cards are priced higher due to their larger storage capacity and faster read and write speeds. However, the price difference may be justified for users who need the extra storage space and performance that SDXC cards offer.

Conclusion

In conclusion, both SD MMC and SDXC memory cards have their own set of attributes that make them suitable for different purposes. SD MMC cards are ideal for users who need a budget-friendly option with moderate storage capacity, while SDXC cards are more suitable for users who require a higher storage capacity and faster data transfer speeds. When choosing between the two types of memory cards, it is important to consider factors such as capacity, speed, compatibility, file system, and price to determine which option best meets your needs. Ultimately, the choice between SD MMC and SDXC memory cards will depend on your specific requirements and budget.