NEX File Folders on SD Card.. By Day???
I suggest to add your photos in the following order:
\2012\March_01 _02 etc....
This way you will be able to track all your images by date.
I also assign a folder for each camera I use:
Fuji X100\2012\Feb\03... etc
So I can keep track of all the different files shot with different cameras.
Hope this is useful to you.