In this video, few people understand the physics of magnetic media storage. Perhaps 99% of people today falsely believe that hard drive storage is permanent. In reality, magnetic media loses bits every minute. Data files “degrade” over time on hard drives because of the frailty of magnetic storage. The degradation process is sometimes called “bit rot,” and it gets worse with higher temperatures. This is why RAID storage arrays must be regularly “scrubbed” to restore lost data bits.