I need extra storage space as my laptop has nearly run out of space on the back-up recovery drive. I have masses of digitial photos on my laptop (all saved as highest quality) so the files are big. As I want to keep them all and keep adding to them, I need somewhere to store them all. Would it best to get a USB flash drive or an external hard drive for this purpose? I won't need to carry anything around, I purely need something for storage. Thanks for any help.