I had no problems using cyberduck or filezilla to do an FTP to my Apple TV until i changed the ATV settings to recognise my external HD as the primary storage.
I can access the ATV still no problem but can’t find the HD.
I go into movies, etc.
Have searched through every possible folder and can not find my HD.
I must add, when i first got ATV Flash a year ago, it was plagued with problems of resetting and slow operation.
Now it is fantastic! Keep up the good work guys!