2 Questions. Where is the backup manually not visible

Hi all.

I have 2 questions.

1st…its very hard to tell what was backed up because it just gives huge categories like music and video.  But how do i know for example, if my iPhone apps were backed up?

2.  After the backup is complete, i can go to My Computer, and mouse over the hard drive, and i can see that space is taken up.  Howwever when i manually go in, it doesnt have a folder like, for example, “WD Back Up” or somthing like that, its as if its empty.