Eli5 what resizing the partition means?
Discussion
Basically lets your computer know there’s more space on the drive
When you clone a 1tb drive to a 2tb drive, you will have a 2tb drive with a 1tb partition (cloned from your original drive) and 1tb of unallocated space left over. You want to resize the partition you cloned to then include the remaining unallocated space in your new drive.