Sherri,
I'm not having a go at you...I'm trying to show you the easy way to re-size your VM that works.
I've just installed Mint Cinnamon 22.1 in Virtualbox and followed my instructions that I gave you...
As you can see the size is 20GB...
Following the instructions I gave you and nothing else...it's now 38GB.
Now select Cinnamon 22.1 and click...Start...Login...
Here we are at the Desktop...it's that easy.
Please don't take notice of what you read on the Net because it can cause more trouble than good especially Terminal commands.
I'm not having a go at you...I'm trying to show you the easy way to re-size your VM that works.
I've just installed Mint Cinnamon 22.1 in Virtualbox and followed my instructions that I gave you...
As you can see the size is 20GB...
Following the instructions I gave you and nothing else...it's now 38GB.
Now select Cinnamon 22.1 and click...Start...Login...
Here we are at the Desktop...it's that easy.
Please don't take notice of what you read on the Net because it can cause more trouble than good especially Terminal commands.

