I have a folder in my SD Card as:
/mnt/sdcard/Folder1/Folder2/Folder3/*.jpg
The name of Folder1 and Folder2 remains constant and inside Folder2 I have F
if your using jellybean just start cmd, type adb devices to make sure your readable, type adb pull sdcard/ sdcard_(the date or extra) <---this file needs to be made in adb directory beforehand. PROFIT!
In other versions type adb pull mnt/sdcard/ sdcard_(the date or extra)
Remember to make file or your either gonna have a mess or it wont work.