To delete more than one photo at a time, see the following:
Tap on Main GalleryThat takes you to a screen with various boxes, i.e., Camera media, All pictures, Camera videos, Camera pictures, and DownloadNow select one of the galleries and tap on that one. It should bring up all the photos in that gallery.Click on 'Menu.'There will be five (5) options: Capture picture, Capture video, Slideshow, Multiselect, and Settings. Choose Multiselect.Tap on the photos that you would like to delete. You should see a little orange box in the lower left corner of each picture. There will be a check in the ones you have chosen to delete. If not, go back and tap on them to select.Scroll down until you have selected all the photos you would like to delete.There will be two options: Delete and Cancel. Select Delete to remove photos from gallery.A gray box will pop up that says, "Delete. These media files will be deleted. There will be two options again. They will be 'Ok' and 'Cancel.' Choose 'Ok.'A black screen will come up that says, 'Deleting images. Please wait.'Voila! Photos should be removed and an empty gallery to start new!
Best of wishes!