In case you’ve missed it (though, if you’re a data professional or other IT pro, you must live under a rock if you’ve missed it), SMBv1 should never ever be used. Alas, some shares out there still exist & use it.
As a DBA, you probably don’t spend too much time managing file shares, or worrying about SMB versions, but you should be asking yourself:
Does my backup target use SMBv1?
If it does, you should fix that.