在外部硬盘上创建图像 qcow2 时出现 Virt-Manager 错误

我在 Ubuntu 20.04 桌面上安装了 Virt-Manager，使用的任务与 19.10 上使用的相同。最后一个我没有任何问题，但是在 20.04 上，当我尝试在外部 HDD 上创建 VM 时，我收到了这个问题：

Unable to complete install: 'Cannot access storage file '/media/user/Storage' (as uid:64055, gid:108): Permission denied'

看详细有这里

Unable to complete install: 'Cannot access storage file '/media/dakne/vStorage/VM/ubuntu20.04' (as uid:64055, gid:108): Permission denied'

Traceback (most recent call last):
  File "/usr/share/virt-manager/virtManager/asyncjob.py", line 75, in cb_wrapper
    callback(asyncjob, *args, **kwargs)
  File "/usr/share/virt-manager/virtManager/createvm.py", line 2089, in _do_async_install
    guest.installer_instance.start_install(guest, meter=meter)
  File "/usr/share/virt-manager/virtinst/install/installer.py", line 542, in start_install
    domain = self._create_guest(
  File "/usr/share/virt-manager/virtinst/install/installer.py", line 491, in _create_guest
    domain = self.conn.createXML(install_xml or final_xml, 0)
  File "/usr/lib/python3/dist-packages/libvirt.py", line 4034, in createXML
    if ret is None:raise libvirtError('virDomainCreateXML() failed', conn=self)
libvirt.libvirtError: Cannot access storage file '/media/dakne/vStorage/VM/ubuntu20.04' (as uid:64055, gid:108): Permission denied

我已经完成了 chmod 'n chown 但什么都没有！！！！