I am now using my WDMyCloud to backup a Synology NAS.
On the WDMyCloud I have only one admin account, created by default upon complete restore of the NAS. I don’t have an “admin” share for that user.
The Synology has a “homes” share to enable a home share for each Diskstation user. I therefore created a “homes” share manually on the MyCloud.
After I create this share, the WDMycloud started publishing the “homes” share and… the “admin share”. When I backed up the content to “homes”, it went to the “admin” share. Often, the connection to the share would fail, etc.
When I deleted the “homes” share on the WdMycloud, both the ghost admin and homes share disappeared.
I concluded I couldn’t have a share called “homes” on the MyCloud and created a “userhomes” share to avoid the problem.
The whole thing might be obvious to Linux experts (maybe “homes” is a reserved thing), but it seem to point to some problem with the firmware.
Are you seeing similar behavior? Does it only happen when the NAS has the default admin account?