in some cases there chances of root directory or master boot record gets corrupt due to hard drive crash. since they are like an index file to access the stored information from the hard drives, corruption of which makes your computer hard drives inaccessible. in such instances format is mandatory to resolve the issue.

Write the above sentence using proper case.
In some cases there chances of Root Directory or Master Boot Record gets corrupt due to hard drive crash. Since they are like an index file to access the stored information from the hard drives, corruption of which makes your computer hard drives inaccessible. In such instances format is mandatory to resolve the issue.