I have a strange issue which neither Canon or SanDisk customer support can explain or help me with. I work on a Windows 10 Pro machine. I just yesterday purchased a 32GB SanDisk Extreme UDMA 7 Enabled CF card. I shot several RAW & JPEG photos and connected my camera to my computer with a USB cable and opened File Explorer. When viewing the files on the card NO CR2 files were present, only JPEG files. There were indeed other files which should have been the CR2 files, but Windows showed them as 0 byte files, without a name or file extension. These "0 byte" files can not be moved or copied. If I place the card in a card reader the CR2 files are present as they should be. I can connect the camera to a Windows 7 machine with a USB cable and Windows Explorer sees the CR2 files properly. Has anyone else noticed such behavior with a UDMA 7 card and Windows 10? Oh, and I do have the latest 1.0.9 firmware installed. The screenshot shows what should be IMG_0190.CR2. I use FastStone as my default JPG viewer, hence the "FastStone JPG File".