Parallels desktop under the Mac system is equipped with a Win7 system. Now there are more than 90 g of the virtual machine package PVM.

Why does the space occupation of PD virtual machines get larger and larger
The virtual machine has an option when installing the system. It is the size of the hard disk space distributed by the virtual machine. There are generally two ways, one is fixed size, you specify a value. The system in this virtual machine can only use such a large hard disk space. But generally the virtual machine is dynamic size by default. That is, according to the increase in the volume of the system in your virtual machine, continuously increase the occupation space of the virtual hard disk in this virtual machine. As the Win7 system in your virtual machine is more and more garbage. More and more software installed, more and more storage. The space occupied by Win7 system in your virtual machine is getting larger and larger. As a result, PD constantly adjusts the virtual hard disk space in large virtual machines. Continuously swallow your physical hard disk space.

The method, the software under the Apple system is already very rich. Try not to do things in the virtual machine as much as possible. The virtual machine is just dealing with the work that only Windows can do occasionally. Therefore, the more streamlined the system in the virtual machine, the better. If you can install XP, you do not install Win7. When setting a virtual machine, the hard disk distribution is fixed. The software in the virtual machine is not absolutely necessary to install it. Frequent garbage in virtual machines. My PD is only divided into 10G space, the installed XP, only software and applications that cannot be installed under a few Macs. Until now 10G space is not half used.