A characteristic of secondary storage that measures how much a particular storage medium can hold.

The characteristic of secondary storage that measures how much a particular storage medium can hold is known as "Storage Capacity".

Step 1: Understand the question The question is asking about a specific characteristic of secondary storage devices that determines the amount of data they can hold.

Step 2: Identify the characteristic The characteristic in question is "Storage Capacity".

Step 3: Define the characteristic Storage Capacity refers to the amount of data that a storage device can hold. It is usually measured in units like bytes, kilobytes, megabytes, gigabytes, terabytes, etc.

Step 4: Relate the characteristic to secondary storage In the context of secondary storage, the storage capacity would refer to the maximum amount of data that the secondary storage device (like a hard drive, SSD, or flash drive) can hold. This capacity is determined by the physical properties of the storage device, such as the number of storage units it has and the amount of data each unit can hold.