![]() The instructions needed to run them are stored in ROM and any user data is held in RAM. Embedded computers, such as those found in a digital watch or central heating system, do not need to store data when the power is turned off. Not all computers require secondary storage. Secondary Storage: This type of storage does not have direct accessibility to the Central Processing Unit. ![]() Secondary memory is non-volatile and used to store data permanently. A USB stick is smaller in capacity, but extremely fast and portable, making it suitable for transferring files between computers. Secondary storage cannot be accessed directly by the CPU. Because all devices are different, some are more suited to certain applications than others.įor example, a hard disk drive has a high capacity and reasonable access speed, making it suitable for everyday storage of programs and data. There are many forms of secondary storage and each type of secondary storage device has its own characteristics. Without secondary storage all programs and data would be lost the moment the computer is switched off. It is used to keep programs and data indefinitely. Secondary storage is non-volatile, long-term storage. Secondary storage is needed to keep programs and data indefinitely. ![]()
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