To start trouble shooting the failure to sync, start with those PC’s that are on the same local network as the My Cloud. Make sure to install the WD Sync while logged in as the Computer’s Administrator or with an account that has full administrator rights Try uninstalling the WD Sync software then reboot the PC, then reinstall the software. If you haven’t already done so configure the My Cloud with a static IP address either within the router’s DHCP server (the preferred way) or via the My Cloud Dashboard > Settings section. Ensure all PC’s are updated with the latest updates. Check the computer’s firewall configuration, disable it as a test to see one can sync. If all else fails try doing a 4 second reset and or a 40 second system restore. .
http://support.wdc.com/KnowledgeBase/answer.aspx?ID=10432
Do not initially try to sync multiple PC’s to the same single My Cloud sync folder if you are trying to do so. There are problems (as discussed in other threads) when trying to sync multiple PC’s to the same single sync folder. See this post:
https://community.wd.com/t/wd-mycloud-sync-issues-between-2-computers-and-cloud/159292/2
Bi-directional syncing is hit or miss. For some it just doesn’t work for some reason. There was a recent thread about that issue:
https://community.wd.com/t/can-wd-sync-synchronise-to-and-from-mycloud/164153
While third party sync programs generally do not allow for remote syncing, one may be able to setup remote syncing using FTP and third party sync software. However, FTP is not a secure protocol. FTP can be enabled through the My Cloud Dashboard Settings section. It may be possible to setup SFTP on the My Cloud and use the Free File Sync SFTP option to sync files. See the following post/thread for more information on possibly setting up SFTP:
https://community.wd.com/t/sftp-setup/95350/5
Prior to the introduction of the OS 3 firmware it would have been possible, with remote drive mapping through WD2Go.com, to map the My Cloud and sync remotely using third party software. However, WD removed the remote map capability with OS 3 and their update to the MyCloud.com web portal. Unofficially it may still be possible to use remote mapping and third party sync software by installing the CloudDAVMod module to a My Cloud running v4.x firmware. Once CloudDAVMod is installed one can remote map their My Cloud once again.
https://community.wd.com/t/app-clouddavmod-v1-0-for-firmware-v4-04-2016/161543
Feel free to voice your opinion about WD removing the capability to officially remote map at the following Cloud Ideas thread.
https://community.wd.com/t/re-enable-remote-drive-mapping-through-mycloud-com/134944
