Question about Netgear ReadyNAS 212

All connections to the old Netgear should first be deleted from the PC and removed, then install the new Netgear. Unfortunately, I lost the data from the hard disk in the old Netgear, but I was able to transfer it again afterwards and it worked for me.
Start LED flashes constantly, can't turn it off with the power button, only one thing helps, pull out the power plug. Good luck!