[ruby-it] Moving all files in a folder to another hard drive

[SpringFlowers AutumnMoon]

I have some code below to move all files in a folder to another hard
drive (which has 2TB of space).  It runs well except that whenever a
filename has some international characters, then the line

  if File.file?(basedir + file)

will fail.   The file is printed as  "Chart for ???????.xls"

Does someone know how to solve this problem with Ruby being so powerful?
The program is running on Windows.  (Vista or XP should both be ok).

code:
------------------------------------

require 'ftools'

basedir = "c:/data/"
target = "w:/data/"

Dir.chdir(basedir)
files = Dir.glob("*");

i = 1
files.each { |file|
  p i, file
  if File.file?(basedir + file)
    puts "Moving..."
    File.move(basedir + file, target + file)
    puts "Now sleeping..."
    sleep(60)
  end
  i += 1
}
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