I am using external usb hard drive to work on my excel files. I have heard that whatever files are left on the hard drive leave a evidance on the local hard drive where it was stored, that is why i use external hard drive. I would like to know does windows leave a trace of some fragments of the file on the operating system drive when i open files form the external hard drive? As to my knowledge the swap file might keep some trace. Is there a perfect solution around this?
