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What SD (or microSD) cards are compatible with my host device? How do I choose the best card for my host device?

There are three main types in the SD memory card family. SDSD High Capacity (SDHC™), and SD Extended Capacity (SDXC™). This article details the different specifications of all three types of SD memory cards and the speed class ratings and compatibilities that are different with each type.

Click here to jump straight to Speed Class & UHS Speed Class Ratings
Click here to jump straight to the Compatibility Summary

Additional Reference: SD Assocation Consumer Information



SD Logo

SD capacities range from 128MB to 2GB

Default Format: FAT16

SD cards will work in all host devices that support SD, SDHC, or SDXC



SDHC Logo
SD High Capacity (SDHC™) card is an SD™ memory card based on the SDA 2.0 specification.

SDHC capacities range from 4GB to 32GB

Default Format: FAT32

Because SDHC works differently than standard SD cards, this new format is NOT backwards compatible with host devices that only take SD (128MB - 2GB) cards. Most readers and host devices built after 2008 should be SDHC compatible.

To ensure compatibility, look for the SDHC logo on cards and host devices (cameras, camcorders, etc.)



SDXC Logo
SD Extended Capacity (SDXC™) card is an SD™ memory card based on the SDA 3.0 specification.

SDXC capacities range from 64GB to 2TB

Default Format: exFAT

Because SDXC uses a different file system called exFAT and it works differently than standard SD cards, this new format is NOT backwards compatible with host devices that only take SD (128MB to 2GB) or host devices that only take SDHC (4GB to 32GB). Most host devices built after 2010 should be SDXC compatible.

To ensure compatibility, look for the SDXC logo on cards and host devices (cameras, camcorders, etc.).

NOTE: Internal card readers on laptops from 2008 and prior may NOT support SDXC cards. SDXC cards will work in SDHC compatible readers (not SD readers) if the computer OS supports exFAT. For more information on exFat see: Operating Systems that support the exFAT File System