10 Important Difference Between SD And SDHC(Tabular Form)


What is the difference between SD and SDHC? SD stands for ‘Secure Digital’ whereas SDHC stands for ‘Secure Digital High Capacity’.

Today’s memory cards are a befuddling jumble of geek jargon, but after you grasp the essentials, it may become easier to understand.

The SD memory card family is divided into four categories. They are SD, SD High Capacity (SDHC), and SD Extended Capacity (SDXC) and SD Ultra Capacity(SDUC).

Secure Digital High Capacity memory cards, which were originally introduced in 2006, resemble conventional Secure Digital cards in appearance and functionality.

SDHC cards, like standard SD cards, can be used in a variety of devices, including phones, cameras, tablets, and laptops.

Both of these cards are removable flash memory cards that can be used to expand memory or store data in electronic devices like cameras and telephones

The key distinction is in terms of capacity and compatibility.

This article compares and contrasts the features of two types of SD cards: SD cards and SDHC cards.

What is SD card?

Secure Digital (SD) is a storage format that uses flash (non-volatile) memory cards to read and write huge amounts of data in a range of mobile phones, cameras, smart devices, and other devices.

An improved version of MMC was used to create SD cards.

Standard SD cards come in a variety of storage capacities (ranging from 152 MB to 2 GB). SD cards with high capacity (SDHC) can contain massive amounts of data, ranging from 4 GB to 32 GB.

The latest iteration of the SD card, the eXtended Capacity SD card (SDXC), can contain up to 2 TB (terabytes) of data as of 2009. Micro SD cards are the tiniest type of SD card.

What is SDHC?

SDHC (Secure Digital High Capacity) is an SD (Secure Digital) card extension that enhances the storage capacity of memory cards to 32 GB. It’s also known as the regular SD card’s version 2.0.

SDHC cards are NOT backwards compatible with host devices that only accept SD (128MB – 2GB) cards due to the fact that SDHC cards are pre-formatted with the FAT32 file system, whereas SD cards are commonly configured with FAT12, FAT16, or FAT16B.

SDHC compatibility should be included into most readers and host devices developed after 2008.

Also Read: Difference Between MMC And SD Card

Difference Between SD and SDHC: SD Vs SDHC

Secure Digital cardStands forSecure Digital High Capacity
2GBCapacity 4GB to 32GB.
By SanDisk, Matsushita, and Toshiba in 1999. Built BySDA(SD Card Association)
24 mm × 32 mm × 2.1 mm.Dimensions24 mm × 32 mm × 2.1 mm.
Standard SD, mini SD and micro SDTypesSDHC, mini SDHC, micro SDHC
Digital cameras, mobile phones, smart phones, gaming consoles,
video camcorders
ApplicationDigital camera and MP3 players
Compatible only with SD host devicesCompatibilityA host that supports SDHC also supports SD Card but host that does not support SDHC will not support SDHC card.
FAT16File systemFAT32


To recapitulate, the SDHC card has a larger storage capacity than the SD card. There is no distinction in terms of quality, security, or speed.

The transfer speed is determined on the “CLASS” of the card, not whether it is SD or SDHC card.

Both of these cards are often used in a variety of electronic items, and as data capacity grows, SDSC cards will soon become obsolete, with data capacities of at least 2GB being supplied.

That’s all there is to it! I hope this helps you get some insight and knowledge so you can make the best decision possible the next time you need new SD cards for your digital products.

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