I hate this new Photoshop. You can't search for pics anymore. You can only upload from your computer or edit what is already in your gallery. I will have to find another imaging site to use since this no longer serves my purpose.
Sounds like you are working with a web service. Photoshop.com or Revel perhaps? Revel is the new one.
You can upload from mobile devices (Tablet PC's or phones) in both services. Where else would you like to upload from? What images would you like to edit that you have not added to your gallery? I'm afraid you can't use our, or anyone else's, products to edit images you don't own (i.e. images in someone else's gallery or on someone else's website).