Not a real backup and very slow on USB
Disappointingly, this isn't a system backup, it's just a copy of certain folders to a removable drive using a locally installed application. You can't select the entire C:³ drive.
There is no protection against deletion or viruses on this backup volume; files are accessible in plain text with their original name and extension.
In USB A it's very, very slow, I'm up to 10 GB copied in 1h30 on the initial backup.
That's hardly better than Windows or Veeam Free Edition snapshots to an external hard drive, for 4 to 8 times the budget depending on the model chosen.