It's often a problem item. I noted it at http://forums.cnet.com/7726-7589_102-5412417.html?tag=posts;msg5412417
Current Setup: iPhone 6, PhotoSync App, Macbook, WD EX2 MyCloud NAS
I have tried FTP, SFTP, & WebDAV and I have not been able to user PhotoSync to sync my photos to my NAS. Yes, the NAS has a native app but the I take a lot of photos on my phone. And PhotoSync knows what photos you haven't uploaded and specifically highlights them for you so all you have to do is the sync button. With the WD native app I'd have to first check on the NAS what was the last photo I uploaded and then individually choose each photo out of the photos I have on my phone. This was easy of course when I had everything setup to sync to Google+ photos.
I've followed the following directions and have tried all kinds of other things and nothing has worked yet. I'd be open to using another app if it could also auto choose the photos that have not already been uploaded. Any ideas? I even tried single port forwarding for port 21 and assigned the IP of the NAS and then did the FTP setup on the NAS along with turning the FTP on for individual shares. Nothing. Ideas anyone?
http://www.photosync-app.com/photosync/en/help/services/answers/how-do-i-use-photosync-with-wd-my-cloud-device.html

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