Back up the same dropbox account from 2 locations

hi ,
i have 2 pc , work and home and i take my ex2100 sometime from my office to my home .
its mean that if i install WD smartware in 2 pc .
if in one PC (work) i already backup my dropbox and in my home i set the same backup ( from dropbox to my ex2100) will it create 2 different backup or merge because it the same ?


Please note that Dropbox is an online backup, so basically you will be doing the backup to the same files because you will be logging in to the same Dropbox account.