CobianSoft

As I wrote earlier in the previous version of Backup 11 Gravity, the backup works for me on the same NAS without problems and I also make archives larger than 120GB (with the difference using 7z archiving).

There is enough space on the disk where the temporary archive is stored, and the archive will be created correctly, including the archive check. Then the file starts copying to the NAS, the file grows quite normally, but after 100% completion, the archive becomes unreadable (corrupted) with zero size.

Yes, then it run OK.
In the previous version (Backup 11 Gravity) I have no problem with practically the same backup settings. The difference here is only in the choice of compression program 7zip, which is not in the new version. The resulting archives are over 100 GB in size.

Cobian Reflector creates a zero-size archive after copying to the NAS (Synology).
However, the archive is not zero length in the working directory on the local disk before copying.
I am creating a global monolithic archive.