How to change folder for a library ?

Hello,

I have just bought a Western Digital My cloud home.

On the cloud,, all of my music files are synchronized in the folder “Sync from desktop” (created by the sync application)

But for Plex, all music files must be in folder “Plex\Shared Music”

Is it possible to customise the Plex music file folder (“Sync from desktop” instead of “Plex\Shared Music” ) ?
Or is it possible to customise the synchronized folder in My cloud home (“Plex\Shared Music” instead of “Sync from desktop” )

Thanks in advance

Joël