Thank for your kind reply.
The green led flashes continuously, even though all PCs are switched off and the ADSL cable to the router is disconnected. There is nothing operating on the network.
I can save files on the disk, using “copy and paste” and ftp as well. However, the “date modified” property of the files is not visible (empty cell) when listed into the windows directory view; I mean, when you double click the directory icon and the disk content is shown in the “show details” mode. If I list the files in a command prompr DOS window, the shown date is always 1/1/1970.
FTP is working; I can copy files using Filezilla ftp client SW. What is not working (anymore, because it has been working for some weeks) is accessing the configuration page by browser. The problem is not, in this case, the IP address, since i can ping the disk and I can access the disk for file copy and retreiving on the lan by ftp and “copy and paste”.
My LAN serves four PCs and an WD-TV live. The router is an Huawei with wireless, four ethernet swict ports and ADSL WAN port (PPPoE). The IP subnet is 192.168.1.0 and the IP addresses of the peripheral devices (disks, PCs, WD-TV) are assigned by DHCP reservation (and so, always the same address to the same device). The WD MyBook disk is connected to one of the router switch ports: another of such ports is used for connecting the WD-TV live and a third port is for a Desktop: on the wireless, there are only three laptops. Another HD-NAS (Packard Bell) is connected to a SAMBA server USB port on the router.
Everithing has been working fine for more than one year: the WD-Mybook disk has been installed a couple of months ago, and has been properly (and satisfacorily) working 'till one-week/ten days ago.
Thanks again, ThePizzaMatrix. Hope these detaqils clarification can help to better understand.