I want to take the computer an A directory (content A lot A lot, there are various types of internal files and directories) copy to the mobile hard disk, then use the command "cp - rf A/media/usb",
Copy after A period of time, the pop-up "cp: unable to create directory '/media/usb/A/... The file or directory "' : no, I waited for a long time, this command seems to be no end, so now I want to ask my computer because error command stuck, or because there is no duplicate the files? And why copy for a long time will pop up the error message?