There is also sync software to make folders match. MS has a free one called SyncToy.
What do you mean by …making folders match?
What else does sync software do for me?
Is ‘copy-to’ , or ‘drag&drop’ going to be any quicker than ‘backup’?
Are ‘backup’ files compressed in some different manner than ‘copy-to’ or ‘drag&drops’ ? i.e. does one take up less space on the Passport side drive?
Also if I ever need to use what is on my passport to replace what is on my PC (after a total crash), do files that have been 'copy-to’ed or 'drag&drop’ed suffice just as a ‘backup’ file would?