What property indicates how much data is in a file?

The property that indicates how much data is in a file is its file size, typically measured in bytes. This size can be displayed in various units such as kilobytes (KB), megabytes (MB), or gigabytes (GB), depending on the amount of data. File size reflects the total amount of storage space the file occupies on a disk. It is an essential factor in determining how much information can be stored and transferred.