The virtual operating systems have to be cleaned up every now and then just like real PCs. For example, you can easily create a virtual Windows 10 with Clean up on-board supplies. Empties recycle bins in Windows, Linux and Co., deletes downloaded files within the VMs and uninstalls unused programs.
In order to reduce storage space, you should first clean up the guest system yourself. The Parallels VM file only 'grows' when you gradually fill up the virtual hard disk. This means: If you have assigned a total of 10 gigabytes of storage space to a Windows 100 VM, for example, it does not occupy it on your Mac hard drive from the start. Virtual machines in Parallels resize by default dynamic. This is how you ensure more storage space on your Mac. It's easy to overlook one of Parallels Desktop's most useful features: the ability to significantly reduce guest memory footprint with just a few clicks. The perfect integration in macOS and compared to VirtualBox In the end, the significantly better performance is worth the money for Parallels - especially because I use the software almost every day due to my job. Despite the subscription system and the associated annual update costs, I have been setting up virtual machines under macOS for years Parallels Desktop.
