It all started with the inventions of computers.
Initially, the computer didn’t come with a lot of storage space. The regular computers right now have a space of 500 gigabytes or 1 terabyte, but earlier on it was barely a few kilobytes.
To expand the storage, or store more files, floppy disks were utilised.
Just like how an external hard drive works for us, a floppy disk would help to store files which couldn’t be stored in the computer due to lack of space.
Although, if one were so keen to organize the hard drives on the computer, it is possible.
You should be having administrative rights and a good knowledge of the workings of your computer in order to set the correct letters to your hard drives.