When you cannot send files immediately or share files with multiple people, you can upload server temporarily, then share with a link.
For a Free user, the link is valid within 48hours and PLUS user set an expiration date of a link as you want.
How to create a link
1. Click to add files or drop flies you want to send.
2. Click 'share link' in waiting page.
3. A link will be created. Click on it to copy.