This means that if we have a group of 50 people, with every person in the group using two hard drives (perhaps one inside a personal computer and one inside a laptop), then one of those 50 individuals is going to lose all the data stored on the hard drives within a year.
According to the latest annual survey of hard drive reliability by Backblaze, a provider of cloud backup services, the annualized failure rate for modern hard drives is around 2 percent.
