Which component is used for long-term data storage in a computer?

The Solid State Drive (SSD) is used for long-term data storage in a computer due to its ability to retain data even when the power is turned off. Unlike volatile memory such as RAM, which loses its stored information when the computer is powered down, an SSD uses flash memory to store data persistently. This makes it ideal for keeping the operating system, applications, and user data over the long term.

SSDs are favored over traditional hard drives for their faster access speeds, durability, and lower power consumption. This allows for quicker boot times and improved performance when accessing files and applications, making them an essential component of modern computing devices.

In contrast, RAM is temporary storage and is used for active processes and data that the computer needs to access quickly while it is powered on. The power supply unit is responsible for providing electrical power to the computer components but does not store data. The CPU is the main processing unit of a computer that performs calculations and tasks but does not act as a data storage component. Therefore, the SSD is the correct choice for long-term storage.