这是他们的回应：

Thank you for your email.

I am really very sorry but virtual machines can’t be backed up for a
simple reason that they are virtual,they have virtual memory,not
physical memory.

Please let me know if there is anything else I can help with.

Kind Regards,

Barry James User Experience Team www.justcloud.com

这些是物理文件,所以我不确定我是否理解了这些反应.我认为可以在使用时备份虚拟机吗？这种反应是否有意义？

我需要一个廉价的替代品来备份服务器上的虚拟机,以防万一.

有什么建议？