Hi! I’m using Virtual Machine Manager and tyring to setup a VM on a separate ssd drive which i mounted in /run/media/username/vmssd. I tried changing partition file system type to NTFS and fat but I always get an error where manager is telling me that I am pointing to a directory not a disk drive.
Here’s the error I get:
Unable to complete install: ‘unsupported configuration: storage type ‘dir’ requires use of storage format >‘fat’’
Traceback (most recent call last):
File “/nix/store/zx63zw7af0lcx88qqz9cy6sy4562s90r-virt-manager-4.1.0/share/virt-manager/virtManager/asyncjob.py”, line 72, in cb_wrapper
callback(asyncjob, *args, **kwargs)
File “/nix/store/zx63zw7af0lcx88qqz9cy6sy4562s90r-virt-manager-4.1.0/share/virt-manager/virtManager/createvm.py”, line 2008, in _do_async_install
installer.start_install(guest, meter=meter)
File “/nix/store/zx63zw7af0lcx88qqz9cy6sy4562s90r-virt-manager-4.1.0/share/virt-manager/virtinst/install/installer.py”, line 695, in start_install
domain = self._create_guest(
^^^^^^^^^^^^^^^^^^^
File “/nix/store/zx63zw7af0lcx88qqz9cy6sy4562s90r-virt-manager-4.1.0/share/virt-manager/virtinst/install/installer.py”, line 637, in _create_guest
domain = self.conn.createXML(initial_xml or final_xml, 0)
^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
File “/nix/store/bks0bn3nsq36lw01pnimj80nbqh2dhj6-python3.11-libvirt-10.0.0/lib/python3.11/site-packages/libvirt.py”, line 4529, in createXML
raise libvirtError(‘virDomainCreateXML() failed’)
libvirt.libvirtError: unsupported configuration: storage type ‘dir’ requires use of storage format ‘fat’
I keep getting this error and I fail with installation, maybe I should point VMM to a different direction?
What do I do exactly to mitigate this problem, VMM always thinks it’s a directory, maybe I should make changes in the mount drive addresses in my configuration files or something of the sort? Please help! Any suggestions would be welcome! 
My ssd mount settings in config file are just these:
fileSystems.“/run/media/username/vmssd” = {
device = “/dev/disk/by-uuid/uuidnumber”;
options = [
“users” # Allows any user to mount and unmount
“nofail” # Prevent system from failing if this drive doesn’t mount
];
};