Wormhole allows you to send files up to 10GB for free. It uses end-to-end encryption and the link automatically expires, which is perfect for a "one-and-done" transfer of a specific Unity version.
Instead of sending the entire project folder, go to Assets > Export Package in Unity. This compresses the files and ensures dependencies are included. Wormhole allows you to send files up to 10GB for free
End-to-end encryption to protect your project data. Wormhole allows you to send files up to 10GB for free