You don't have a reliable option. It's that simple. If you value your data, keep backups. And if you want to avoid hiccups in productivity, use RAID. Data that

You don't have a reliable option. It's that simple. If you value your data, keep backups. And if you want to avoid hiccups in productivity, use RAID. Data that you don't have backed up is data that you don't have. And keep in mind that RAID, while useful, is not a backup. It doesn't protect against theft, whole-computer destruction, human error, or many other things.