To make the data unrecoverable: While formatting, you can opt to erase the drive securely, which will make its existing data unrecoverable by file-recovery apps. To erase everything: Formatting a drive wipes everything, and is a quick way to clean the drive without having to manually delete files.

For example, you may see a popup alert saying, “ You need to format the disk before you can use it.” In such instances, formatting the drive should fix the ongoing issues. To fix a corrupted drive: A flash drive may get corrupted and show errors when you connect it to a computer. In this situation, you’ll have to format the external drive to a supported file format. To change the file system format: If the external drive you’re trying to connect isn’t recognized by a computer, smart TV, tablet, phone, or other such devices, that’s likely because the drive’s existing file system format is one that’s unsupported by the operating system of that device. 8) Looking to erase your startup volume? Why format a drive

How to clear a mac hard drive