What is Dropbox?
Dropbox is a personal cloud storage service (sometimes referred to as an online backup service) that is frequently used for file sharing and collaboration.
what is direct link?
What’s the maximum file size I can upload?
The maximum file(s) size is :
Dropbox 300 MB
Google Drive 100 MB
Can I upload password protected links?
Yes, You can. just add your username and password to links.