I have two hard drives connected to my WD TV, which is connected via a ethernet cable to my router.
I usually transfer my movies from my mac to my hard drives through the WD TV BUT as of today I cannot copy files to my hard drives, as it comes up with a “Universal No” sign when trying to drop a file into a folder on the hard drive.
Update:
Just realised that the folder my movies are in on the WD TV is displaying as read only BUT I can copy movies from the WD TV to my mac.