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Start Parallels Desktop and do not start your virtual machine. Starting from version 14, Parallels Desktop® will periodically check free disk space left in the virtual hard disk and offer to increase (resize) hard disk via macOS® notifications. In case you increased the size of the disk in the VM configuration, but Windows shows the same disk size, please refer to KB 123372. Note: This article does not apply to Boot Camp-based VMs, where the primary partition size cannot be increased as its size is predefined by Boot Camp Assistant.
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Warning! We strongly recommend that you check your VM hard disk for errors and back up your VM before following the steps below.
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I am running out of free space on my virtual machine (VM), and I want to increase the size of the virtual hard disk.
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