I imported a lot of photos and videos into the Photos app yesterday. It said it was uploading 36GB. I awoke this morning and it noted it needed to upload another 140 items, 18GB. This afternoon it completed the 18GB and then noted it was uploading 138 items but does not seem to be doing anything now. It keeps stating it is uploading 138 items without noting any file size amount. The activity monitor networking tab doesn't reveal Photos to be partaking in any significant network traffic. Any ideas?