Open a terminal ( Applications > Accessories > Terminal)
Originally Posted by jeremyjjbrown
cp /path/to/present-location-of pictures/* .
This will create a folder flashcard and access it. Then all that is placed in the present location folder of your pictures will be copied to this new folder. Change "/path/to/present-location-of pictures/" to whatever folder name you are using now.
chmod -R 755 flashcard
Next you will jump one folder up the tree and change the file mode bits so you should be able to access them.