A redundant array of independent disks (RAID) group is made up of several levels and is a way to store data in different hard disks. Each RAID level has its own benefits and drawbacks, but RAID 0 is the easiest to create and, therefore, most popular among home users. RAID 0 offers the best performance, but does not offer redundancy. This means that if one disk malfunctions, all the data on that disk will be lost. However, the rest of the data can be recovered.