Fabi

I have 3 Computers A, B and C that all sync the same folder "Data". In this folder there is a folder "smartphone" that should only be syncronized between A, B and my mobile phone. It is possible to sync it between A and the mobile phone but when I try to add the folder on computer B there is an error "The folder can't be added to an existing syncronized folder. Please choose another folder" Does anyone has an idea how to solve this without buying a pro account? Thank you!