The first time I connected an external hard drive (not WD) through USB it worked, the hub started reading files and took some minutes to compile the media library catalog ,but I chose to not syncronize (files not copied on the internal HD). All files in the external were visible.
After this I can’t see the external hard drive anymore, now I want to syncronize (copy all files into internal) but I can’t because the HD is not visible.
I tried to cancel the media library compilation but nothing happened, it does not recompile the external.
I tried to put the original firmare but nothing happened
Now when I plug the external hd the LED flashes regulartly at constant rate but the HD is not visible.
How can I remediate to this? Why the first time it worked?