The SSH File Transfer Protocol is a network protocol that provides file access, file transfer, and file management functionalities over SSH.
By using SFTP you can easily change, browse and edit files on your Raspberry Pi. SFTP is easier to setup than FTP as Raspbian has SSH enabled by default.
Download the latest FileZilla Client version for your operating system from filezilla-project.org.
Launch FileZilla and go to File > Site manager.
Fill in the IP address, user name and password (by default the user name is pi and the password raspberry) of your Raspberry Pi in the dialog and choose SFTP as the protocol.
Click Connect and you will see the home folder of the user.
Open Nautilus on the client machine
Select File > Connect to Server
Type: SSH
Server: <The Pi's IP address>
Port: 22 (default)
User name: pi (default)
Password: raspberry (default)
Open the Chromebook's file manager app.
Scroll to the bottom of the file tree in the left panel.
Click Add new services
Select and click
SFTP file system
In the dialog box that opens, enter:
The IP address or
The hostname (default is `raspberrypi`)
Enter port 22 (Not the one shown next to the IP address on your pi)
Add user `pi` and the password (default is `raspberry`)
You may encounter another dialog box for security; if you do, click Allow or Accept.