Install Thunar

 $ sudo apt install thunar
Reading package lists... Done
Building dependency tree       
Reading state information... Done
The following package was automatically installed and is no longer required:
  libfprint-2-tod1
Use 'sudo apt autoremove' to remove it.
The following additional packages will be installed:
  exo-utils libexo-2-0 libexo-common libexo-helpers libthunarx-3-0
  libtumbler-1-0 libxfce4panel-2.0-4 libxfce4ui-2-0 libxfce4ui-common
  libxfce4util-bin libxfce4util-common libxfce4util7 libxfconf-0-3 thunar-data
  thunar-volman tumbler tumbler-common xfconf
Suggested packages:
  devhelp thunar-archive-plugin thunar-media-tags-plugin tumbler-plugins-extra
The following NEW packages will be installed:
  exo-utils libexo-2-0 libexo-common libexo-helpers libthunarx-3-0
  libtumbler-1-0 libxfce4panel-2.0-4 libxfce4ui-2-0 libxfce4ui-common
  libxfce4util-bin libxfce4util-common libxfce4util7 libxfconf-0-3 thunar
  thunar-data thunar-volman tumbler tumbler-common xfconf
0 upgraded, 19 newly installed, 0 to remove and 0 not upgraded.
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Get:1 http://id.archive.ubuntu.com/ubuntu focal/universe amd64 libexo-common all 0.12.11-1ubuntu1 [9.232 B]
Get:2 http://id.archive.ubuntu.com/ubuntu focal/universe amd64 libexo-helpers all 0.12.11-1ubuntu1 [22,1 kB]
Get:3 http://id.archive.ubuntu.com/ubuntu focal/universe amd64 libxfce4ui-common all 4.14.1-1ubuntu1 [173 kB]
Get:4 http://id.archive.ubuntu.com/ubuntu focal/universe amd64 libxfce4util-common all 4.14.0-1 [54,8 kB]
Get:5 http://id.archive.ubuntu.com/ubuntu focal/universe amd64 libxfce4util7 amd64 4.14.0-1 [24,7 kB]
Get:6 http://id.archive.ubuntu.com/ubuntu focal/universe amd64 xfconf amd64 4.14.1-1 [109 kB]
Get:7 http://id.archive.ubuntu.com/ubuntu focal/universe amd64 libxfconf-0-3 amd64 4.14.1-1 [33,4 kB]
Get:8 http://id.archive.ubuntu.com/ubuntu focal/universe amd64 libxfce4ui-2-0 amd64 4.14.1-1ubuntu1 [43,4 kB]
Get:9 http://id.archive.ubuntu.com/ubuntu focal/universe amd64 libexo-2-0 amd64 0.12.11-1ubuntu1 [113 kB]
Get:10 http://id.archive.ubuntu.com/ubuntu focal/universe amd64 exo-utils amd64 0.12.11-1ubuntu1 [46,3 kB]
Get:11 http://id.archive.ubuntu.com/ubuntu focal/universe amd64 thunar-data all 1.8.14-0ubuntu1 [729 kB]
Get:12 http://id.archive.ubuntu.com/ubuntu focal/universe amd64 libthunarx-3-0 amd64 1.8.14-0ubuntu1 [69,7 kB]
Get:13 http://id.archive.ubuntu.com/ubuntu focal/universe amd64 libtumbler-1-0 amd64 0.2.8-1 [20,2 kB]
Get:14 http://id.archive.ubuntu.com/ubuntu focal/universe amd64 libxfce4panel-2.0-4 amd64 4.14.3-1 [37,9 kB]
Get:15 http://id.archive.ubuntu.com/ubuntu focal/universe amd64 libxfce4util-bin amd64 4.14.0-1 [5.688 B]
Get:16 http://id.archive.ubuntu.com/ubuntu focal/universe amd64 thunar amd64 1.8.14-0ubuntu1 [303 kB]
Get:17 http://id.archive.ubuntu.com/ubuntu focal/universe amd64 thunar-volman amd64 0.9.5-1 [124 kB]
Get:18 http://id.archive.ubuntu.com/ubuntu focal/universe amd64 tumbler-common all 0.2.8-1 [61,9 kB]
Get:19 http://id.archive.ubuntu.com/ubuntu focal/universe amd64 tumbler amd64 0.2.8-1 [71,6 kB]
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Processing triggers for desktop-file-utils (0.24-1ubuntu3) ...
Processing triggers for mime-support (3.64ubuntu1) ...
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Rebuilding /usr/share/applications/bamf-2.index...