This is why it is best to move them first.
So you will have to tell Kontakt where to look for the files again. Please note - If you link your sound files into Kontakt and then go on to move the original files, it will break the link within Kontakt. We place all of our sound files onto a secondaryhard drive, to save space on our main drive. Once you have downloaded your new sample library which contains Kontakt Files, make sure you have put them into your desired sound storage area - this can be anywhere on your computer, it's just so you know where they are - it's not really a good idea to leave it on your Desktop or in your Downloads folder.