Non-PVE, non-Debian Backup

you can backup raw images or block devices as .fidx archives using proxmox-backup-client (you probably want to set --backup-type and --backup-id):

https://pbs.proxmox.com/docs/backup-client.html#creating-backups
To create a backup of a block device, run the following command:

Code:
# proxmox-backup-client backup mydata.img:/dev/mylvm/mydata

there is no special vmware integration that would ensure consistency or also backup the configuration, so you'd need to handle that yourself (the VM config in a backup created by PVE is just a blob with the raw config file for a PVE VM, so if you can convert your VMWare config to that you could also back it up so that the result is maybe directly restorable in PVE ;)). alternatively, you could manually create the VM on PVE, map the backed up image using proxmox-backup-client, and then use the "import-from" syntax to copy from the backup into a newly allocated volume on your desired target storage.