you have multiple possibilities to backup your vm from a standalone esxi:
Export via OVA: https://emtunc.org/blog/06/2012/backing-up-an-esxi-5-guest-vm-by-exporting-to-ova-ovf-template/
ghettovcb: ghettoVCB.sh - Free alternative for backing up VM's for ESX(i) 3.5, 4.x & 5.x
veeam free tool: Veeam Backup Free Edition for virtual machines (VeeamZIP)
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Regards from Switzerland,
B. Fernandez
http://vpxa.info/
