Erase of drive- getting back the software

Hi, I am a new user of the WD ultra passport,  I made some errors and backed up some wrong stuff so deceided to start again, I erased the drive, but  noticied  the WD software has also gone,   how  do I get this back onto the F drive of my  WD  drive? and what do I select  as far as items to download.

The other question I have is  that  I am only going to use it to  back up on occasion any changes to my music and picture files on my PC,    is there a way to set this up so it just looks for changes or will it have to re back up the whole 60 os GB of data, if I just add 1 new albulm of images it sees a bit odd that  teh back up has to go and back up teh whole file again ?

Any help would be great

Hello and welcome, 

You can see all of the available download for the Passport Ultra on the following link.

http://www.wdc.com/wdproducts/wdsmartwareupdate/wdsmartware.asp?id=wdfMP_Ultra&os=win

After the first backup, Smartware will only continue to backup the new or modified files.