[Owncloud] use external storage with owncloud and other programs

[Matthias]

Hey group,

I have a question regarding the external storage app. Is the external 
storage app suitable for the following situation:
I want to mount my music folder in owncloud. Otherwise I want to access 
my musik folder with other applications like the windows media player. 
Will this procedure result in trouble? Will owncloud get confused if 
files get changed or locked by another application?

Thanks
Matthias