Frequent Hung up of my cloud EX4

Dear all WD User i need your good support
I have WD my cloud EX 4 frequent hung up and when i check the notifier some times i found link down or rebuild the volume also i set auto rebuild off so i need some help in this issue please

Hello,

Try to do a system only restore on the device to see if ti helps, Here is a link that will help you with this: