That depends on the size of the photos. If you are storing photoshop PSD or RAW files from your camera, not many. If, however, you are storing files from your smartphone, they tend to be tiny, and you can store a bunch. However, if you want to store pictures, I would recommend a much larger flash drive (64 GB or 128 GB.) 16 GB is no longer considered an average size and will probably fill up too quickly for you.