Storage on flash memory cards in devices such as digital cameras could rocket to 2TB if new specifications are implemented.

The SD Association announced the SDXC (extended capacity) memory card specification, which could drive up the size of Secure Digital Memory cards to 2TB. Initial SD cards released by manufacturers based on the specification will provide storage capacity of 64GB, said Rex Sabio, co-chairman of SDA.

SDXC will also have a faster bus speed in devices with slots that support it. It will be able to transfer data from an SDXC slot to the media at 104MB/s, quadrupling current speeds, Sabio said. New SD cards based on the specification will probably come from manufacturers by the end of the year.

SD cards are removable media that can be slotted into devices to store images, video or other data. SD cards are used in many portable devices, such as cameras and gaming consoles, and the related miniSD and microSD formats are the most common removable memory for mobile phones.

SD media slots are available in 8,000 devices under 400 brands, SDA claims.

Faster bus speeds will bring faster recording time to camcorders that incorporate SDXC-based slots. The newer slots will also draw information from SD media more quickly so that mobile phones, gaming and navigation systems perform better, SDA said.

SDXC slots in devices will be backward compatible and support older forms of SD media, Sabio said.

SD cards currently come in many different form factors, from the size of a postage stamp to the smaller MiniSD and MicroSD cards. The SDXC standard is designed to fit into all existing form factors of SD media, Sabio said.