What are they?

SD memory, or secure digital cards, is an external storage mechanism that stores data. They are predominantly used in digital cameras to save photographs. When a picture is taken the photograph is saved to the SD memory card. That data can then be transferred from the SD memory card via an adaptor or memory card reader to a computer, or other devices such as a digital photo frame.

SD memory cards can also be used as an alternative to USB Flash Drives. Every computer comes with a fixed amount of memory. Most users will have additional memory requirements, for example storing photos, music or movies. In such cases a SD memory card can fulfil this requirement.

The measurements

Most SD cards measure around 32 by 24 by 2.1 mm in dimensions. However the thickness varies and they can be up to 1.4 mm slim. These cards are also asymmetrical in their shape so that one cannot insert the card into the slot upside down. You will also find that the contacts are recessed so they cannot be easily damaged. The data transfer rate is especially high with an SD memory card which makes them preferable to other storage media.

The end usage

SD memory cards can easily be used in computers which have an SD memory card slot. For those that do not, a memory card reader or adaptor can be used instead to connect the SD memory card to a computer or peripheral device. Several SD memory cards come with USB connectors built in, which means they can be used as a SD memory card and USB device.

What are they?

SD memory, or secure digital cards, is an external storage mechanism that stores data. They are predominantly used in digital cameras to save photographs. When a picture is taken the photograph is saved to the SD memory card. That data can then be transferred from the SD memory card via an adaptor or memory card reader to a computer, or other devices such as a digital photo frame.

SD memory cards can also be used as an alternative to USB Flash Drives. Every computer comes with a fixed amount of memory. Most users will have additional memory requirements, for example storing photos, music or movies. In such cases a SD memory card can fulfil this requirement.

The measurements

Most SD cards measure around 32 by 24 by 2.1 mm in dimensions. However the thickness varies and they can be up to 1.4 mm slim. These cards are also asymmetrical in their shape so that one cannot insert the card into the slot upside down. You will also find that the contacts are recessed so they cannot be easily damaged. The data transfer rate is especially high with an SD memory card which makes them preferable to other storage media.

The end usage

SD memory cards can easily be used in computers which have an SD memory card slot. For those that do not, a memory card reader or adaptor can be used instead to connect the SD memory card to a computer or peripheral device. Several SD memory cards come with USB connectors built in, which means they can be used as a SD memory card and USB device.