Synchronozing last 12 hours. Should I cancel.

[mulo_g]

I am synchronizing my deja contacts locally on my phone to android local contacts. I have approximately 11,000 contacts. I have selected rewrite on next sync. I have Not selected usb. Account selected is DejaOffice. It is one way to android. It has been nearly 12 hours but sync not completed. I want my deja contacts in android contacts also. My android version is 11 and phone is Asus ROG 2 with 512 gb/12. My deja office is updated.
What is happening? How to achieve what I want? Is there a bug in deja or some permission issue? If cancel has no effect how to stop it?

[mulo_g]

I cancelled and did again. Sync seems to be ok. I chose usb sync this time. For native sync is it necessary to select usb? Or, none is ok?
After the sync it was showing status with indefinite timer nothing else. I clicked ok.

[Thomas]

Native sync does not need to be enable for any sync type.