I've had this problem for years and it's driving me crazy. I've just dealt with it. If anyone can solve it, I would appreciate it so much! I own a Western Digital My Cloud (http://www.wdc.com/en/products/products.aspx?id=1140), it's just a 1TB network drive, it's plugged into the router and I can see it in "Finder" under the shared area. I use it to share media (music/movies, etc) and then stream from my television or access from other computers in the house. 4 out of 5 times I click on it under shared in finder I get the message "WDMyCloud can't be opened because the original item can't be found". To fix it, all I do is restart my macbook and it spontaneously reconnects and works again. How do I fix this???? Is there some kind of "Keep-Alive" I can set up in OSX? I've tried almost every setting imaginable on the device itself. It's becoming so frustrating to restart first before I can manage media from my macbook. I have OS X El Capitan.