```ruby
require 'gphoto2'

# List all files

def visit(folder)
  files = folder.files
  puts "#{folder.root? ? "/ (root)" : folder.path} (#{files.size} files)"

  files.each { |file| puts file.name }
  puts

  folder.folders.each { |child| visit(child) }
end

GPhoto2::Camera.first do |camera|
  visit(camera.filesystem)
end
```

Update list files example to include file metadata
user
```ruby
require 'gphoto2'

# Recursively list folder contents with extended metadata.

MAGNITUDES = %w[bytes KiB MiB GiB].freeze

# @param [Integer] size filesize in bytes
# @param [Integer[ precision
# @return [String]
def format_filesize(size, precision = 1)
  n = 0

  while size >= 1024.0 && n < MAGNITUDES.size
    size /= 1024.0
    n += 1
  end

  "%.#{precision}f %s" % [size, MAGNITUDES[n]]
end

# @param [CameraFolder] folder a root directory
def visit(folder)
  files = folder.files

  puts "#{folder.path} (#{files.size} files)"

  files.each do |file|
    info = file.info

    name = file.name
    # Avoid using `File#size` here to prevent having to load the data along
    # with it.
    size = format_filesize(info.size)
    mtime = info.mtime.utc.iso8601

    if info.has_field?(:width) && info.has_field?(:height)
      dimensions = "#{info.width}x#{info.height}"
    else
      dimensions = '-'
    end

    puts "#{name.ljust(30)}  #{size.rjust(12)}  #{dimensions.rjust(12)}  #{mtime}"
  end

  puts

  folder.folders.each { |child| visit(child) }
end

GPhoto2::Camera.first do |camera|
  visit(camera.filesystem)
end
```
assistant