For files larger than 40 GB, you need to download the Dropbox desktop app 
Note: This link is valid till 48 hours
Download Dropbox
Install the Desktop App
Follow the Installation Wizard
Sign in to Dropbox: Log in with your user credentials provided below
Upload the database: Upload your database file
Encrypted File
Dropbox files at rest are encrypted using 256-bit Advanced Encryption Standard (AES).
In-Transit Security
Dropbox uses SSL and TLS to protect data in transit between Dropbox apps and our servers.
Secure Server
We use cutting-edge malware protection and perimeter security to safeguard our servers.