thanks you very much dang for all the info.
i have been toldthat exaft mught not write all data.. are you familiar with that?
i used to be a PC user ever since..and i am still a PC user using the hard drives for backing-up data and archive (pics/ docs etc')
so i need a solution for some older hard drives which were used by PC. and will be used both on mac and PC in present and future.
i am a new user with the mac (i am a photographer, using it for Photoshop and with parallel installed i also use the Office 2013)
so i need a good and permanent stable solution, for current hard drives that contain files and future hard drives.
if the best solution will cost me some $$ let it be.. as long it will stop my head heck
thanks again!