Remote access stops working after my internet IP changes

My Cloud OS 3 Personal & Network Attached Storage My Cloud
4

I have the same problem. If you search old posts, other people face the same issue, too. I think we just have to wait for WD to fix this in the next firmware release.  If you are interested, I post my temporary solution here:

http://community.wd.com/t5/WD-My-Cloud/unable-to-access-my-WD-mycloud-device-remotely-via-internet/td-p/726452