The type of file that would be MOST likely to be measured in gigabytes is a 60-minute video.
Video files typically have larger sizes due to the amount of data they contain, especially at higher resolutions and bit rates. In comparison, email messages, song files, and databases could be smaller, though a large database might also approach gigabytes depending on its content. However, a single 60-minute video will almost always be in the gigabyte range.