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Hard Drive in Oracle Virtual Box Help

I am building an Oracle Virtual Box VM on a laptop.  I have set the storage on the hard drive to 32 GB fixed.  I run through the install to the reboot.  When it comes back up it wants to reinstall CentOS 8 again and in the Installation Destination window the disc is still 32 GB but only about 1 MB is available.  What am I doing wrong? I follow the book and videos to a  tee but no beans.  And why do I need to reinstall CentOS?  I have set up VMs in VMWare just fine.  I am new to Virtual Box.  Can you help?  thanks.
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Peter ChanProblem resolver

Commented:
Hi,
You can choose "Dynamic size" in VBox, that is having advantage than "Fixed size".
Louis LIETAERInfrastructure Architect
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Commented:
Hi,

Shutdown your vm, delete the disk, and create a new one before new installation.
Software Engineer
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Commented:
Did you remove the virtual CD-ROM from "drive"  during the final reboot?

If not it will boot from CD-ROM again ... etc.
No need to change delete/reinstall atc.
Louis LIETAERInfrastructure Architect
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Commented:
Hi noci,

sure "No need to change delete/reinstall", but doing it this way, will work for sure !
nociSoftware Engineer
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Commented:
@Louis: If on the next install the DVD/CD image is not disconnected it will reboot from CD/DVD image again and again ask for a reinstall.... etc.
Ensure that after install during the reboot the "DVD/CD" is ejected!  Then the drive can boot.
CD/DVD in most cases is before the harddisk in boot priority. OTOH the boot priority can be changed so the harddisk is chosen first... Which will prevent booting from a CD/USB if there is a valid bootable sector / gpt on the disk. (If it THEN fails it will get stuck in a bootloop).
Louis LIETAERInfrastructure Architect
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Commented:
@Noci : Sure you are right, after rereading the initial question, if @mcjim2k do want to reinstall lentos, il will have to remove cd image from vm.

My initial thought is that @mcjim2k wanted to reinstall the OS.