Instead of a USB flash drive I am copying my retail disk to my 160gb Western Digital external HDD. But it's taking forever--it's been copying files now for 2 hours and it's still less than half done. I don't mind waiting; this is not an impatience fueled post. I'm simply curious why it's taking so long and wonder if it indicates a problem. The drive is perhaps 3/4 full so that might be part of the problem.
Thanks for any thoughts
EDIT: I noticed that my MacBook was running the virus scan on the OS X DVD. I canceled it, started over, and it copied in maybe 20 minutes.