You can properly compress video on your iPhone using a third-party app to free up storage space or transfer a video file to other devices.

When you compress your PowerPoint, you'll have to reduce the quality of any music, videos, or pictures you have in your slideshow.

This is an archive format that can hold files and folders This article describes what ZIP files are and why they're used in some situations. We'll also look at how to open one to see its contents, and ...