I'm on Debian testing.I'm trying to install a vm on a storage which is located on a ext4 formated usb stick. However I'm getting a permission error before the OS can be installed. I'm using Virtual Machine Manager:Unable to complete install: 'Cannot access storage file '/media/user/mnt/generic.qcow2' (as uid:121, gid:131): Permission denied'Traceback (most recent call last):  File /usr/share/virt-manager/virtManager/asyncjob.py, line 88, in cb_wrapper    callback(asyncjob, *args, **kwargs)  File /usr/share/virt-manager/virtManager/create.py, line 2288, in _do_async_install    guest.start_install(meter=meter)  File /usr/share/virt-manager/virtinst/guest.py, line 461, in start_install    doboot, transient)  File /usr/share/virt-manager/virtinst/guest.py, line 396, in _create_guest    self.domain = self.conn.createXML(install_xml or final_xml, 0)  File /usr/lib/python2.7/dist-packages/libvirt.py, line 3777, in createXML    if ret is None:raise libvirtError('virDomainCreateXML() failed', conn=self)libvirtError: Cannot access storage file '/media/user/mnt/generic.qcow2' (as uid:121, gid:131): Permission deniedI mounted the usb using the following command:sudo mount -t ext4 /dev/sdb1 /media/user/mnt  -o rwI have also tried to chmod 777 on the mount point while the usb was mounted as well as on the storage file itself (generic.qcow2).Further I changed the owner of the mount point to libvirt-qemu (uid=121) however the error still persists.How can I provide the appropriate permissions to be able to install the OS?
kvm - how to use a usb as storage
permissions;virtual machine;kvm