What is the difference between a SD and SDHC memory card?

Answer 1

An SD card is a Digital media card, and they make them up to 2GB in size.

An SDHC is the same thing, but it has High Capacity, and and you can get them from 4GB to 32GB in file size.

The difference is file size, that is all. an SD card is 512MB-2GB and an SDHC is 4GB-32GB.

For more information on SD cards, visit www.sdcard.com

Answer 2

From SanDisk's website:

If your computer's internal memory card reader works with 2GB (or lower) SD memory cards but fails to read a 4GB (or higher) SDHC card, then the computer's internal reader is not SDHC compliant. The initial SD card spec defined the interface for cards only up to 2GB capacity. The subsequent SDHC spec was developed to provide increased capacity up to 32GB. Computers and other products purchased before 2008 may not be SDHC compatible. Computers and other products purchased before 2007 are not SDHC compatible. If the card reader slot on your computer does not have the SDHC logo, it is most likely not SDHC compatible and will only read cards up to 2GB capacity.

Solution: If your computer's internal memory card reader is not SDHC compatible, you have 3 options:

1. You can buy an inexpensive SDHC card reader that will connect to any computer USB port.

2. You can connect your camera (or other device) with the SDHC card still in the device, directly to a USB port on a computer using a USB cable. You should be able to transfer files from the device to the computer this way.

3. You can contact you computer manufacturer to see if they have a firmware update for your model that will make it SDHC compatible.

The SD card is a older model, and is not compatible with SDHC, which has a larger capacity.

SD Cards can store up to 2GB of storage, without using SDHC technology. The cards use the FAT12 or FAT16 File System*.

SDHC (Secure Digital High-Capacity) can store over 2GB, and is capable of supporting up to 32GB. SDHC was introduced in June 2006. These cards use the FAT32 File System*.

Older devices (designed for SD only) cannot support SDHC memory cards, but all SDHC-supporting devices are backwards-compatible with SD.

*Both cards can be formatted to use other file systems.

Answer 3

SDHC cards are designed for capacities higher than 4 GB. While electronically and physically compatible, SDHC cards cannot be used in many older devices, because the device won't know how to format such a large card.

Answer 4

SDHC memory cards are high capacity SD cards. You will need a card reader that supports SDHC or the SD slot on your computer must support SDHC. SD card readers that are a few years old will not be able to read SDHC memory cards. Check the specs.