Yes, it was empty to begin with, but I quickformatted it by Windows standard means before running the test just to be sure.
That's fine with quick format. I'm not quite ready to rule out your card is fake. Most fakes are 4 GB in size relabeled to something much bigger (ie 64/128/256 GB).
I want to rule you out you got a sophisticated old stock fake that is 32 GB size but isn't really class 10.
Can you perform a read and write test on the card? Drop a single 1 GB file to check it's write speed, and recopy that file back onto your desktop. Gotta see if its I/O performance is up to snuff before ruling out hardware issue.