Use the 321 rule. 3 backups, 2 different media, 1 of them off site. You should keep your external drive backups. “Cloud” gives you the off site, but by itself

Use the 321 rule. 3 backups, 2 different media, 1 of them off site. You should keep your external drive backups. “Cloud” gives you the off site, but by itself from the point of a user it is just 1 media and 1 backup. Even if they likely have a lot more internally.