I'm rooted for 4 or 5 years with my Android, so I hope this works
1. Get an android terminal app, and connect to your local wifi point
2. Start sshd on the pc and run ifconfig to see the wifi IP
3. on the android, run ssh <user>@<IP> e.g. if your user is john and pc is on 10.0.0.5, ssh email@example.com
4. It asks questions and answer them agreeably
If that works and you get in, exit and repeat with sftp firstname.lastname@example.org
NOW you can transfer files with ftp conmmands - get, put, etc.