Re: Not really useful
Was quite interested in this until I saw the price.
For a bit over half the cost I have a WD MyPassport 2TB and a Ravpower Filehub which between them do exactly the same job. OK it's two devices rather than one, but both of them together fit perfectly into an Amazon Basics MyPassport case and has the added benefit that the Filehub can also act as a battery/power source for any device via it's USB port (as well as driving the HDD that way).
May be another alternative for those who are interested in such an application. Two versions available, cheaper/older one (£30) with 3000mAh and SD, or new V2 for £45 with 6000mAh, LAN (Ethernet), microSD and DLNA (both with SMB, wifi hotspot and USB2 over it).