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Memory specialist SanDisk has created an SD card with 512 gigabytes (GB) of storage space - the highest capacity ever released. The card, which is the size of a postage stamp, will go on sale for $800 (£490). The launch comes a decade after the firm released a 512-megabyte (MB) SD card with one-thousandth of the space. Experts believe SD cards could eventually hold up to 2 terabytes (TB) of data, about 2,000GB. The new card is aimed at film-makers shooting in the high-quality 4K format. The 4K format - which is four times the resolution of HD - requires large file storage. Depending on compression, a single minute of 4K shooting will typically take around 5GB of storage space.

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