Almost all cameras use removable memory cards to store photos and video. A few smaller devices use fixed in-built memory instead, but these are relatively rare. Memory card types Memory cards come in many different types, though many have slowly been phased out and others are very specialised. The most common type is the SD/SDHC/SDXC […]
The data transfer rates of memory cards and other storage devices are measured as 'read/write' speeds – it's usually much faster to 'read' data from these devices than to 'write' data to them.