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Pro Allows you to access remote or local locations
On recent versions of GNOME, you can click the Files entry in the panel to access the a specific location (remote or local), connect to a certain server (FTP, SFTP, SAMBA, etc.), access your bookmarks, open a new window, as well as to change its default functionality.
Pro Easy to use and familiar user interface for Ubuntu users
The user interface of Files is very familiar to Ubuntu users, most probably because Canonical still uses Nautilus (an old version of it) as the default file manager for its world’s most popular free operating system, Ubuntu Linux.
It split into two parts, a sidebar and the main file viewer. While you already know what the latter can do for you, the sidebar offers quick access to Places, Devices and Network locations, as well as any other bookmarks that you can add whenever you want.
Pro Widely supported
The program is distributed as a single source archive, which can be configured, compiled and installed on almost any Linux flavor. There are no binary files for a specific Linux distribution, but you can install it directly from the default software channels of your operating system.
Pro Convenient file moving progress
Nautilus shows the progress of file move operations in the top right. This doesn't get in your way. You can keep using the window while the operation is progressing.
Pro Google drive integration
Pro Fully supports DPI
Con Mostly unconfigurable
There are not many ways to configure Nautilus to fit your needs. Besides what can be seen in the settings button you can't configure it further.
Con No Tree View option any more
This is a crucial feature for my daily work with a file manager and without a Tree View option a file manager seems pointless to me.
The reason for dropping this feature is weird. From https://gitlab.gnome.org/GNOME/nautilus/commit/ef467c8775392d0f0feb0e38f7a80f2d41719d84 :
"It is the list view after all. Tree models don't work well on
touch and it isn't consistent with the file chooser."
Con Doesn't support "open as root"
Seems to be one of few file managers that can take several seconds to open.
Con Gradually losing its features
Unlike most software, where new features are added over time, Nautilus (along with other Gnome applications) tends to lose features, and for unclear reasons.