Dropbox is one of a handful of pivotal services that make the Internet indispensible for business owners, sort of like the way that cat videos made YouTube an essential Web site for your mom.

FileStork is a convenient way to receive files from students and colleagues directly into Dropbox. Here’s how it works.

Dropbox has painted a giant target on its back by offering one simple, additional feature to its file-storage service: a link-generating button to enable public file-sharing.

While Dropbox public links are very useful for sharing files with your friends, a lot of files (text files, MP3s, PDFs, and others) will automatically open up in their browser.