...
You will need to use an SSH/SFTP client that supports OTPs. Filezilla, Bitvise, and Fetch are SFTP clients that support OTPs. The connection process will work like a usual SSH/SFTP connection with the exception that you will be prompted to enter a OTP after you enter your normal server username and password. You'll need to generate a OTP using Google Authenticator or another compatible OTP app. Instructions for setting up the OTP app are below.
...
Any OTP compatible SSH/SFTP client will work. The following instructions show how to connect with FileZilla Filezilla.