Let's face it, the form factor for this amount of storage is incredible. Sits tight and hardly sticks out. There are no problems with heating either. That said, it should be pretty obvious to even the most tech-savvy of us that given the form factor, it's hardly possible to deliver what's promised on the box (I can't exaggerate, this thing is tiny). Accordingly, copying over a few small files works well and with good speed. The writing speed drops sharply from a file size of 500 MB (<2.5 KB/s). Same behavior on Windows 10 or Ubuntu 18.4. Formatting in a different file system does not matter. In short, what a gimmick, it's great to expect reliable business use of it, or maybe not. I returned mine. Instead, I would recommend the slightly larger Samsung, which are fast and very reliable.
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