usepackage{forest}

begin{document}
begin{forest}
    for tree={
        font=ttfamily,
        grow'=0,
        child anchor=west,
        parent anchor=south,
        anchor=west,
        calign=first,
        edge path={
            noexpandpath [draw, forestoption{edge}]
            (!u.south west) +(7.5pt,0) |- node[fill,inner sep=1.25pt] {} (.child anchor)forestoption{edge label};
        },
        before typesetting nodes={
            if n=1
            {insert before={[,phantom]}}
            {}
        },
        fit=band,
        before computing xy={l=15pt},
    }
    [text1
        [text1.1
            [text1.1.1 ... Here goes a description that could be multiple lines long]
            [some_random_file.txt ... This description is not aligned with the description above]
        ]
    ]
end{forest}
end{document}