What are SDHC cards?

The size of the American postal stamp, a secure digital card with a high capacity (SDHC) is a Flash Memory device that can hold between 4 and 32 gigabytes (GB) data. These cards are a form of removable memory that can be used with many different digital devices, including camcorders and computers. Although several other SD card products are available, only machines that are marked as SDHC cards can be used.

is used

SDHC cards store and transfer information from one compatible machine to another. Many different types of devices, from digital cameras to music players to photo sharing products, produced by most different manufacturers, have slots that accept these cards. SDHC cards are perhaps the most popular to record and transfer media - including sound, video or static images - from a camera or recorder to a computer to be stored or manipulated. These storage devices work like many others:Users can copy and paste the card on the card, store it directly or extract information from it.

classification and storage

SDHC cards were designed to improve on the original Secure Digital memory card (SD) developed in 1999. The new card helped satisfy the growing demand for high -capacity storage caused by increasing use of high -resolution video and digital photographs with high resolution. SDHC cards also offered a new advantage for consumers: Classification of data transfer speed (DTS). Manufacturers categorize these products according to minimal permanent DTS, grouping cards into four different classifications:

• Class 2: Minimum permanent DTS 2MB/sec
• Class 4: Minimum permanent DT 4MB/sec
• Class 6: Minimum permanent DTS 6 MB/sec
• Class 10: Minimum permanent DTS 10 MB/sec

Cards

in higher classes mOhou transfer the plague of the datve to most cases quickly, although it may depend on the card reader. Classes are also set to minimum DTS, not maximum, and the user can get much better performance. For users, however, it is best to test the speed of writing its device and use the recommended class, as this performance can be crucial to the user.

Class and capacity selection

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cards in higher classes are useful for people who want to record high -resolution video (HD) or save many high -definition photos. For example, someone trying to record a high -definition video on a slower memory card can find that it does not gain the quality it expects if the video records at all. Most experts recommend class 6 for HD purposes; Its speed is usually fast enough for most recordings and is cheaper than Class 10 card. Standard SD or SDHC class 2 is usually fast enough to record a standard definition.

32 GBThe card can hold 4 161 22-megapixel photographs of compressed or 416fotographs of the same size and quality uncompressed. In terms of video, this card can hold the same size 60 two -hour videos shot at 30 frames per second (FPS). However, users should make sure that their camera or camcorder can handle this amount of storage, because some cheap devices cannot be used with high -capacity cards.

Compatible devices

Most devices are designed to read a specific type of memory card or other storage method that is the current industry standard, along with many of its predecessors the same technology if they are still available for sale. But the opposite is not true; Most older products cannot read memory cards made from newer technology. In other words, machines that have SDHC card slots can usually use this standard and earlier SD, but those with SD slots usually cannot read SDHC cards. The result is thatE Some companies have created software patches that allow older devices and newer cards to cooperate or produce or produce or produce or produce readers who could be connected via the USB port.

If the product manual is not explicitly listed by a high -capacity card as a type of memory that can be used or says that the device is compatible with SD 2.00, it cannot use the SDHC card without an external reader. There are also newer card technologies called SDXC and most of the SDXC cards also read SDHC cards. Despite this, the SDHC -specific device can be able to read the SDXC card or usability can be limited.