Hi Marco, 

Welcome to Box Community and glad to help! 

Currently, you won't be able to move your local Box folder location from C: Drive, sorry for the limitation. 

Looks like it is subject for feature request and for any product feature request or suggestions, we recommend you post your idea on pulse.box.com for more visibility. Our product team reviews all submissions and will consider whether to include feedback in their product roadmap. 

Thanks for posting! 

I signed up yesterday and only later did I realize that I won't be able to use it because I can't install it outside the "c". I need to cancel urgently.