When the hard drive damage, go to [Settings > HDD Management > Space Management] and we can see the status became Unsafe. Please follow these steps to replace a HDD.
Replace a HDD in ITE2 NAS
Switch to [HDD management> HDD information] and check the damaged hard drive, open the NE-201 directly to replace the hard drive.
If the damage hard drive is the first one, please replace the hard drive on the left. If not, please replace the right one.