Hello,
We apologise for the delay in response.
Hyper-V and Vmware Cloud VMs work like a dedicated server and both store VM data in .vhd and .vmdk image formats respectively. It is always recommended to go for a remote backup plan with these packages. Please refer
Offsite Backup Service | Backup Solutions | Remote Data Backups
For Hyper-V VMs, if we have to take backup from the hardware node then the only option is to take the backup of every .vhd file (for every VM) so that we can restore it as is it is when required. This option uses same disk space assigned to every VM. If we takes backup remotely then it takes much time. So we are using USB hard drives to take backups, we have almost attached USB drives to all Hyper-V nodes but still few nodes remaining.
Same way for Vmware VMs right now we are taking weekly rsync backup though it requires much time and disk space of our backup servers. Sometimes backup scripts takes 2-3 days to complete the backup.
We are also dealing with a third party licensed backup product known as "R1soft", this application needs to be installed on every VM and then we can schedule and restore the backup for required files.