Bob and ebiggs1, et al. - To clarify this situation further, it is indeed a Windows 10 and 50D issue. If you had a 50D with a UDMA 7 card containing CR2 files on it they would not be recognized by Windows 10 via a USB connection, in that they would b...
I can personally confirm that this is a real issue. I just yesterday (October 29, 2018) bought a new SanDisk 32GB Extreme card (UDMA 7 Enabled) from Best Buy and RAW files are not saved! There are only 0 byte placeholders where the CR2 files should e...