And because PDF Expert has Dropbox, Google Drive, and iCloud Drive support built right in, it takes just a few seconds to open a ZIP file and move the files inside to where you really need them.

How does a zip file work, and how can you use it? Here's everything you need to know to master the art of sending massive files.

By default, the iPhone has issues with opening zip files, especially if the file includes something more than just a PDF. You can open a zip file on your iPhone and use the files with a free app.

Zip files compress your folders or files and save storage on your computer. They're also easier to send from device to device. Here's how to make one.

Any help will be appreciated!” The quickest way to do this is to ZIP the PDF file and protect the ZIP file, or use Microsoft Office’s built-in encryption tools to create a password.