By virtue of it’s efficient memory management and performance, you can even send up to thousands of photos/videos. [Photo Sender] uploads the photos/videos even when you leave the app. The upload is done in background and you’re notified when the upload completes. 

In addition, you don’t need any USB cable nor additional PC application to synch your photos between iPhone and PC/iPhone.
 This app was $2.99/£1.99 but you can pick it up for free by clicking here.