Sometimes funny things happen with different card/cardreader combinations.
I have an issue reading the Sony SD 16GB UHS-1 with the Lexar USB 3.0 reader.
Loads very slow, then tells me, the files are corrupt.
Same issue with the Hama USB 3.0.
With an old Hama 2.0 device the download worked fine.
Interseting thing: also cardreaders can be updated by firmware. I dind`t know this until a friend told me.
Didn`t help in the case of the Hama USB 3.0/Sony SD combination......
1D MKIV, 1DX MkII, 5D Mk IV; lot of lenses, flashes etc
Fuji X100s, Sony RX100 III,
Fuji X- XT1, X- Pro2, XF 23 1,4, XF 18- 55 2,8-4, X- T1, XF 16/1,4, XF 55- 200, XF 56/1,2, XF 50-140, XF 100- 400