I read on a handful of other forum sites and all say the same thing. It looks to not have any kind of battery power for automated backup of content. If it did, Seagate would showcase that feature which they are not doing. Hoping I am wrong on that thinking.
Personally I am going to TEST DRIVE the WD solution and see how that works out.
Amazon.com: WD 3TB My Passport Wireless Pro Portable External Hard Drive - WIFI USB 3.0 - WDBSMT0030BBK-NESN: Computers & Accessories
It offers not only SD card auto transfer but also USB. Problem like all these **** drives is that it's USB port is 2.0 and not 3.0 for the mobile flash transfer, but it's connection to the PC is usb 3.0 so at least to copy data off the drive to the pc is fast.
Most of these devices just have a very bad software interface on the mobile front or have limitations of file size transfers or very slow performance on data copy. Time will tell after testing.