Sorry couldn't update after post it. I forgot to add description.
Here is details:
I just create AWS Lightsail and tried to connect by SFTP from Filezilla, Putty, PHPStorm and any SFTP connector, but still gave me Disconnected: No supported authentication methods available (server sent: publickey) error.
- I downloaded Private Key from AWS Lightsail -> Account -> SSH Keys -> Virginia (us-east-1) pem file
- used puttyGen and converted to PPK file and tried to connect SFTP.
The result is here still giving me error. I didn't want to create PAIR KEY to EC2, because i am using AWS Lightsail