Time Machine Backup Setup Not Possible (showing maximum size of 0KB)

Hi everyone. I would like to activate the Time Machine Backup Feature on my EX4100. However, when I activate it and choose “configure” it is indifferent which share I select - all of them show a "Maximum Size of “0KB”. It is also indifferent to which percentage I move the slider - it is always 0 KB. I went forward and tried saving the configuration but to no avail. It then keeps showing “Updating” but nothing happens.
I want to mention that my shares are “not full” and also accessible via SMB/FTP at the same time. Does anyone have an idea how to solve this issue? Thank you!

Hi @RenB,

Have you opened a Support Case? If not opened, for more information, please contact the WD Technical Support team for the best assistance and troubleshooting: