What Happens If the Connection Drops During Synchronization, Backup or Replication?
When ViceVersa overwrites an older file with a newer file, first it copies the new file to a temporary file in the destination folder. Only after the copy operation completes successfully, ViceVersa replaces the older file with the temporary file. So, in case of a connection failure only the temporary file is affected. Just run ViceVersa again when the connection is restored, the temporary file will be removed.