RAID describes a set of disk arrays used for creating data storage in computer machines. The Fraction of the space allocated for redundancy usually depends on the number of disk arrays. Hence, the usable amount of storage available is 12 TB.
Amount of usable storage per disk would be :
3TB - 0.6TB = 2.4TB
Total usable storage = 2.4 TB × 5 = 12 TB
Hence, 12 TB of storage can be used by Sonia.
Learn more : https://brainly.com/question/25646541