Welcome to the Community,
which guest OS do you have and how did you configure the virtual disk (one large .vmdk file or multiple 2GB sparse files). In case of a Windows guest OS you shrink the virtual disk from the VMware Tools box (in the system tray). Depending on the virtual disk type you will need sufficient free disk space since the process will copy the data to a new .vmdk file.
If shrinking is grayed out, your VM might have snapshots which first need to be consolidated.
André