Unknown error

[maurfin]

One of the saves I use is copying data from 2 external ssd disks to an external HDD.
This has always happened without problems.
But now I have reinstalled Catalina on my MAC, relative to the disk called "My dati" I get this error.

It is not a big problem, I do "ignore" and everything works but I would like to understand the reason for this error.
Thank you

[xCSxXenon]

Just exclude that from the sync. It probably wasn't there before and the fresh install put it there.

[maurfin]

Thanks