strannik - looked at your other thread about git. I am not familiar with git or sparkleshare myself. But this thread may be of some vaue to you, primarily the firmware source code part 
→ http://community.wd.com/t5/WD-My-Cloud-EX2/SFTP-possible-on-EX2/m-p/748604#M633 And though ot may not be of direct use to you, you may be able to customize the firmware to suit your needs.
And though that post is about EX2, there is very little dfference between the EX2 and Mirror.
If that info helps, please click the star under my username on the left to give me a kudo.
