WD MyCloud Replace WD Sync with OwnCloud

Can we replace WD Sync from Western Digital MyCloud with OwnCloud?
I don't want to change out the firmware or the basic configuration on MyCloud. All we are doing is syncing several directories, which are 7 layers deep in folders so that 3 people, one inside the office and two outside the office, can keep their AutoCAD directory and Files directory in sync.

It's not completely clear to me what you want. Do you want to re-use the hardware? If so, can you install ownCloud server on it? You probably can not use the ownCloud sync client to sync to the WD server.