Copy/Paste them from your media folder ("mnt/sdcard/media/audio/ringtones). From your droid to your computer. Of course you have to hook your phone to your computer Via usb and remove them to a folder called anything you like. Name it ringtones.  After they are on your computer in the folder you created hook the blackberry z10 up to your computer navigate over to your "ringtones folder you made" and then transfer them to the "Ringtones" folder on your blackberry. A simple select all, copy then paste to the ringtones folder on your new Blackberry should work. Place them in your notification folder on the blackberry if you want them for that as well.  Your droid should be unhooked from your computer before you hook the blackberry up to your system. It can be found as another drive letter on your computer when you hook the blackberry.  Please note I am not now or have I ever been a Blackberry expert.