To access the My Cloud remotely from your laptop, you can use either the WD My Cloud Desktop program or the MyCloud.com web portal. Both allow for uploading/downloading of files to/from the My Cloud.
The WD Sync program will “sync” the contents of folders on your laptop to the My Cloud while your in a remote location. Currently the WD Smartware backup program does not support remote backup.
WD removed the ability to remotely map the My Cloud to one’s computer last year. Unofficially one could use SSH to install the unofficial CloudDAVMod that would allow for remote mapping of a Share.
https://community.wd.com/t/app-clouddavmod-v1-0-for-firmware-v4-05-2016/161543
