The truth is most computers still come with one harddrive and multiple partitions on the same hard drive are no more secure should the drive fail so for the average user they have one hard drive with one visible partition (they may have recovery partitions or windows boot partitions but not ones they control).
For the rest of us, Microsoft made it very easy with libraries to move your existing folders or to add additional folders under My Documents, My Music, My Pictures, & My Videos or you can even create your own Libraries if you need more than those four.
To move your existing library you must be on the "My" entry not the header. For example if you select properties on
Pictures then there is no
Location tab. But if you select properties for
My Pictures you should see a
Location tab. On that window you can
move the library or
find target (for if you already created a new folder that you want to use).
View attachment 4100
If you wish to keep the existing location PLUS add a new one that is when you use the high level folder
Pictures (without the "My"). When you select the properties of
Pictures you get a list of included folders that make up this Library. At first you will only have the one but you can
Include a Folder to add more.
View attachment 4101
And the most powerful of all is the ability to add your own Library if you want something besides
Documents,
Music,
Pictures, &
Video. The easiest way to explain that one is to link to an article I posted on
How to add Downloads to your Libraries. Downloads is just an example of course, you can add any Library name you like.
When I came to W7 I hated libraries. I wanted my folders where I wanted them and I didn't need some Libraries links in Windows Explorer because I wanted to go directly to my actual folders. But I have been converted because it is extremely versatile and convenient to have them right up top where I can get them quickly. Regulars here have heard me say it numerous times but it is true, I use libraries 99.9% of the time. I rarely have to go somewhere that isn't under my Libraries.
Hope that helps.