You might require more disk space in a virtual machine, for example, if you want to install a large application or work with a large number of files. You can increase the size of the virtual disk already associated with your virtual machine, or you can add a new virtual disk. You can create a virtual hard disk to add to a virtual machine.

Shut down or power off the virtual machine. You cannot change the setting while the virtual machine is powered on or suspended.


From the VMware Fusion menu bar, select Window > Virtual Machine Library.


Select a virtual machine and click Settings.


Click Add.


Click New Hard Disk.


Click Add Device.

A new hard disk appears. The new hard disk is selected and a default file name appears in the File name pop-up menu.


(Optional) Change the file name for the new virtual hard disk.


Select the file name in the pop-up menu and select Save As.


Type the file name for the hard disk in the Save as field and click Save.

VMware Fusion creates the virtual disk file with this name and stores it in the bundle directory.


Use Disk size to set the maximum size for the hard disk.


(Optional) Under Advanced options, set the Bus type for the hard disk to IDE or SCSI.

Changing this setting is recommended only for advanced users. VMware Fusion selects the bus type that is most appropriate for the virtual machine guest operating system.


Set your disk space configuration, depending on the constraints of the file system.



Pre-allocate disk space

Can give better performance for your virtual machine. If you allocate all the disk now, you cannot use the VMware Tools shrink disk feature later. Allocating all disk space now is a time-consuming operation that cannot be canceled, and requires as much physical disk space as you specify for the virtual disk.

Split disk into 2GB files

Default. Some file systems, such as FAT and UFS, cannot support very large files. Use this option if your virtual machine will be used in a hard drive with a file system that does not support very large files. This option splits your virtual disk into 2GB files. Also, use this option if you might place the virtual machine on an external FAT drive or if you might move the virtual machine to an external drive.


Click Apply.