Here is a quick update. I copied over about 35gb of videos and photos over using the auto upload from SD feature. it worked great with nothing other than a quick insert of the SD card and a button push. It copied the data over very quickly. (approx 10-15 min, didn't exactly time it). I had to change the settings to not show original quality content since all my videos were shot in 4k and the device was having a tough time caching that large of content to display. Once I bumped the quality down to 1080p, I was able to very quickly access and view all of the photo's and videos directly from my computer or the mobile device while it was still stored on the WD drive. It's performance is very good and didn't have any issues. I even loaded PLEX media server onto it and I was able to load up an unprotected movie onto it and stream it wifi onto my mobile device.
At this point I now have a 3tb drive for $180 that allows me to automatically copy content directly from an SD card OR a usb source onto the internal drive without any interaction other than a press of a button. It has the ability to copy or move the content but I opted to copy and I will use my Mavic or camera to erase the media once it's content has been copied over.
One other thing I like is that I can attach the mavic (not yet tested) or a camera directly to the WD using usb and have it transfer it's content over without having to remove the SD card. BUT the transfer speed on the USB port is only 2.0 where as the SD slot is USB 3.0 speeds.
So far very happy and I will give it some good testing over the weekend and onto next week. Down the line having the ability to stream other types of content (music, photo's, video / movies) from other folders that I can setup on the device OUTSIDE of the SD card backup folder is going to add even more benefit. Thats where the 3TB storage will become very handy while on vacation. Not only will I be able to offload all my vacation content onto this device but also be able to view them at anytime onto any media and have access to other pre-loaded content that I may have brought for my kids to also have access to.