ADD DETAILED POP-UP DESCRIPTIONS TO FOLDER ICONS
hover your mouse pointer over a folder icon, you see a pop-up that
contains the folder's size and the names of the first few files or
folders it contains. There are cases when this information, along
with the folder's name, is helpful in identifying the folder's contents;
however, there are other times when you have to open thefolder to
really see what's in it.
NOTE: If you don't see a pop-up when you mouse over a folder, you need to enable a couple of settings. Go to Tools | Folder Options and then select the View tab. Then, in the Advanced Settings list, select the check boxes for Display File Size Information In Folder Tips and Show Pop-Up Description For Folder And Desktop Items. Click OK.