You should shut down the computer immediately, the clicking sound may generate because of the head problem of the hard disk, if you keep the hard disk running it may result in seriously damage of the disk platter and data cannot be recovered.

It depends, if the problem of the hard disk is head failure, we need to replace the head first otherwise we cannot see the data, in that case customer need to confirm the service charge first before we proceed, if the problem is bad sectors, we may be able to show all or partial file list to customer first, so it depends on the problem of the hard disk

The only thing you can do is doing backup, all hard disks may fail suddenly without any sign, so nothing can do to avoid the failure.

Unfortunately, it cannot, data cannot be recovered if the chip was physically broken.

Of course, we provide data erasure service for any quantity, if you have one hard disk want to erase, you can bring it to our office and we will handle it for you right away, the charge is $200, it only takes one minute for the process.