create md5 for each R3D in any folder

# this is probably the most powerful & yet simple script to deal with folder/filenames that contain spaces
# it's only contain a single line command, but actually executing multiple commands before reaches md5 command and passes each file names to them
# as you see, we are no longer using a for loop

find "/Volumes/Folder Name/That/Contain Spaces" -type f -name "*.R3D" -exec md5 '{}' >> master-md5.txt \;