YES! You can connect your Pebble+ to Google Drive, Mozilla Backpack, SkyDrive, DropBox or other PebblePad accounts.
Once connected you will see an option for the linked external service in your Store. When you click on this all the items in your linked file store will be listed. You can link to these items or add media items to assets without having to upload them into Pebble+. To connect to one of these file stores go to the Burger menu and choose Additional Settings > External services.