A virtual machine is rarely just one file. Its folder may contain virtual disks, snapshots, suspended-memory files, and configuration data, and an old VMDK may not be obviously connected to the machine that still uses it.
Start with the VMware virtual machines row
Scan the drive and look for VMware virtual machines in SizeTrend's Overview pane. A .vmx configuration file identifies a VMware Workstation or Player machine. SizeTrend groups the VMware disk, snapshot, suspended-memory, and configuration files stored beside it, then shows the measured total for that location.
Expand the row before deciding what is old. The folder name may be more useful than a large VMDK filename, especially when VMware has split a virtual disk into several pieces or created snapshot files over time.
A snapshot is not a spare copy
VMware snapshots can grow while the machine is used, and the current state may depend on a chain of base and snapshot disks. A suspended machine can also keep a large memory-state file. Deleting one of those files in Explorer can make the virtual machine unbootable.
Open the machine in VMware and use its snapshot manager to review or consolidate snapshots. Shut the guest down completely before removing a machine. A suspended guest is still an active machine state, even if its files have not changed recently.
Possibly orphaned does not mean safe to delete
SizeTrend lists large .vmdk files outside every folder where it found a .vmx configuration as Possibly orphaned VMware virtual disks. That is a useful investigation list, but it is not proof that the disks are unused.
A virtual disk can be stored separately, shared by another machine, or referenced by a configuration on a different drive. Verify each disk in VMware and check the relevant .vmx configuration before removing anything. SizeTrend deliberately does not delete these files automatically.
Remove the machine through VMware when possible
If the virtual machine is no longer needed, first confirm that it contains no unique documents, databases, test data, encryption keys, or snapshots you still need. Back up or export anything important, then use VMware's normal removal workflow.
If you only need to reclaim part of the space, review snapshots and files inside the guest rather than trimming the host folder by hand. Compacting a virtual disk is a separate VMware operation and may require free working space, so follow the instructions for the VMware version and disk type you use.
Find the machine behind the disk before removing anything.
SizeTrend separates recognized VMware machines from VMDK files that need a closer look.