Need to send someone a big batch of files? Don’t attach one after another after another to your e-mail. Instead, compress the files into one smaller, easier-to-manage file. In other words, “Zip” them.

When it comes to sharing a file (audio, video, image, or PDF), there is always a size limitation. For example, Gmail only lets you upload files of a maximum of 20MB. If there is anything more, you ...