21+ Secondary Storage Hardware Pics. While a computer can, in theory, be made out of almost anything (see misconceptions section). This is in contrast with primary storage.
With this, the computer can only accommodate a limited sized program and data.
Simply put, it's computer hardware that stores data until it's explicitly deleted or overwritten. Secondary memory can also be called as backup. This differs from primary storage technology, such as an internal. While the computer's primary internal hard drive is the most common secondary storage device.