hello all... i just upgraded my system to OSX and now i am trying to back up alot of my older work files onto an external hard drive. it is working just fine for some of the files but not for others. some of my file names are highlighted in a green, these files i can pull onto the external, but then if i turn it off and delete the files from my computer, then turn the external back on they also seam to get deleted from there. is there a way to get rid of the link that is happening between these file and the external? why is this happeneing? also some of my other files are highlighted in yellow...what is the meaning of this? hopefully this is an easy problem to fix. thanks to anyone who can help.