The Nautilus tree view on my system has two entries: "Home Folder" and "Filesystem".

The term "Filesystem" is bad English in the same way as "Filename" and
"Username".  They appear in some computer documentation because they are the
name of a C indentifier which may not contain spaces.  In user documentation and
user interfaces, there is no good reason for these terms to be artificially made
a compound noun.

I ask that this be renamed to "File System", which is more consistent with the
other entry "Home Folder".

I would also wonder if we couldn't find better names for these.  Perhaps
"<user>'s Files" and "All Files" or something similar.