我已经在 Ubuntu 20.04.5 LTS 上从 snap 安装了 FreeCAD (0.20.2)。尽管 FreeCAD 已启用对 /home 目录的访问，但我无法将文件保存在主目录中：
$ snap connections freecad
Interface Plug Slot Notes
browser-support freecad:browser-support :browser-support -
content freecad:foo-install-cups - -
content[icon-themes] freecad:icon-themes gtk-common-themes:icon-themes -
content[kde-frameworks-5-96-qt-5-15-5-core20-all] freecad:kde-frameworks-5-96-qt-5-15-5-core20 kde-frameworks-5-96-qt-5-15-5-core20:kde-frameworks-5-96-qt-5-15-5-core20-slot -
content[sound-themes] freecad:sound-themes gtk-common-themes:sound-themes -
cups freecad:cups cups:cups -
desktop freecad:desktop :desktop -
desktop-legacy freecad:desktop-legacy :desktop-legacy -
gsettings freecad:gsettings :gsettings -
home freecad:home :home -
network freecad:network :network -
opengl freecad:opengl :opengl -
removable-media freecad:removable-media - -
shared-memory freecad:shared-memory :shared-memory -
unity7 freecad:unity7 :unity7 -
wayland freecad:wayland :wayland -
x11 freecad:x11 :x11 -
我在 FreeCAD 中打开了文档，保存为 /run/user/1000/doc/cb5d929d/aa.FCStd 我选择File/Save as并可以访问 /home。我选择某个目录并输入名称bb。当我单击“保存”时，FreeCAD 没有任何抱怨。现在文档属性显示文件名称/run/user/1000/doc/630aade2/bb.FCStd已更改，但先前选择的目录中没有 bb.FCStd 文件。
如何保存 /run 之外的文件？
编辑：我更新了有关 FreeCAD 版本的信息。它是稳定的 0.20.2，而不是我最初写的 0.21