Here is how my version of the script looks. I went through each necessary step individually, and left any step I didn't follow commented out in the script. Make any changes you need to:

!/usr/bin/sudo bash

lsblk

This will list all the drives attached to the system.

echo What drive would you like to use? Be careful. This tool can be system destroying. echo (e.g.\; /dev/sda1)

Prints text to STOUT.

read DRIVE

Reads user input from STDIN.

I skipped this part as my drive was already mounted.

mount $DRIVE

echo $DRIVE mounted

Mount whichever system disk you need from lsblk output to fake the size of.

echo CD to /tmp cd /tmp

Change to temp directory.

echo Creating a Directory named \"flash\" mkdir flash

Create a directory called flash.

echo CD to /tmp/flash cd flash

Change directory to the newly created "flash" directory.

echo 'Enter file size in Kilobytes (1000000000 = 1TB) : ';read FILESIZE

Ask user for fake file size in kilobytes.

echo Creating MSDOS File System mkdosfs -C temp_file $FILESIZE

mkdosfs creates a MSDOS file system in the file "temp_file" with a kilobyte size of 1tb or 1e+9 or user defined file size.

ls -lha

This will show you the list of files in the current working directory displaying the header info as 954G's.

ls -sh

This will show you the TRUE file size, NOT header info.

echo Unmounting $DRIVE
umount $DRIVE

Unmount whichever system disk you used on line 2.

ls -s temp_file

List files and displays the size of the temp in non-human readable (dropping -h).

echo Requesting escalation to root \for \write to $DRIVE

Ignore the "\" in front of for/write. This was done to fix an issue with the color coding of words in my text editor.

sudo su

Elevate shell to root privileges.

Here I had to re-declare the DRIVE variable as it didn't carry over into my root session...

read DRIVE

I use the same variable as in the regular user terminal session.

head -c 244136K temp_file > $DRIVE

Redirect readout at 244136K of temp_file to $drivename.

echo Write successful, de-escalating shell exit

De-escalate shell to normal user privilege.

Here I remounted the $DRIVE, otherwise it didn't show up in the results of the next step.

sudo mount $DRIVE /media/joshd

The mount point (/media/joshd) is obviously going to be user specific, as any other user might choose a different mount point.

df -h

Display file sizes (-h human readable i.e.; 1Mb instead of 1024kb) as read from header.

sudo fdisk $DRIVE

Displays actual file size.

I didn't follow through with the rest of the steps, as I was having trouble with the mlabel/dosfslabel commands.

echo 'Input New Label for Drive (e.g.; 1 TB DRIVE) : ';read $DRIVENAME

Ask user for new drive label.

sudo mlabel -i /dev/sd# ::"$drivename"

Relabel drive using the mlabel tool.

sudo dosfslabel /dev/sd# "$drivename"

Relabel drive using dosfslabel tool.

echo Complete! Drive should now reflect as $drivename and $drivesize in KB