A ZIP file is an archive that stores any number of individual files in a single file. ZIP files are extremely efficient because they compress the size of the original files into a smaller aggregate size. They’re also great for keeping whole libraries of picture files, such as JPG files, backed up and readily portable. ZIP your JPGs no matter which operating system you use, as ZIP is supported by Windows, Macintosh, and Unix-based operating systems. Tips Writer Bio

How to Zip JPG Files - 99