Memory plays a vital role in the functioning for every electronic device. Either it a portable DVD player or the huge electronic display banners. All need memory for their functioning. Though, every device comes with some internal memory it sometimes is not efficient for regular users. Like a PC Memory, complex machines like PC have more than one source of memory. It has both secondary and primary sources of memory. The speed of functioning of the system mainly depends on primary which is generally known as PC memory. And incase the default memory is not enough to store all your data you can opt for other storage devices, like memory cards and DVDs.

Not just memory cards or DVDs are used as storage devices. Other devices like CDs, external flash hard disk drives can be used for storage. Memory cards and external hard disks are flash storage devices which are small and can store more data. Memory is also necessary for laptops and play stations. Laptop memory is almost equal to the memory of a PC but it is slightly comes with a higher price tag.

Play station or a PSP has an inbuilt storage device which is used to save the same proceedings and other media stuff. PSP memory is quite enough for a normal gamer but for a professional this memory isn’t enough. And for this purpose he needs to buy external memory devices like memory sticks which will increase the memory of his PSP up to 8 GB.