Archive Zip -

Compresses files to save storage space and decrease transmission time.

Cloud services like Dropbox can be used for sharing, or other formats like .7z (7-Zip) or .rar (WinRAR) for higher compression.

Generally implies simply combining files into a single, uncompressed container for organization, though modern tools often treat these terms interchangeably. If you're having trouble with a specific file, let me know: Are you using Windows or Mac ?