Smartware backup Win10 super slow

Hello, everyone,
I’m using the Mirror 2nd gen for 2 years with a Win8 notebook. So far without problems.
Now a notebook with Win10 was added. I have completely formatted and reset to factory settings. Now, Backup with Smartware worked with the Win8 computer as usual (about 90 GB overnight). But not with the Win10 notebook : About 30 GB of 95 were backed up overnight, but since then its superslow: 2 nights about 0.5 GB.
SMB 1 is clicked. Volume Shadow Copy activated. Firmware and operating system are up to date. Reconnected several times, restarted

Any ideas?

Thanks a lot!


You could refer to the following links:

The backup may have skipped some folders: