Leonardo-147: Sigh. People do seem to be having problems with this. I don't blame them, it's pretty screwed up.
The basic answer is simple: as I have already explained, the camera's USB connection is a mess. It only shows MP4 files, which is stupid. Even there, it's buggy. So for the third time, get a card reader.
But to answer your question, if you insist on using USB:
First of all, make sure the camera is in the right mode. Go to settings, "wrench" menu, page 8, and look for "USB Mode". Set it to "PTP Connection". (BTW, I think this is the problem -- they should be using MTP, not PTP.)
Now when you plug the camera into a Windows computer, Windows handles the R5C in a "special" way. It doesn't get assigned a drive letter; instead the CFExpress card shows up as "This PC\Canon EOS R5 C\CFe". I believe this is why it doesn't show in Resolve, whereas it does show up in Windows file explorer -- programs like Resolve don't know how to access the "special" devices, they only know how to look for drive letters.
Even in the file explorer, you will only see MP4 files -- no RAW or XF files -- and even for MP4 files, it seems to be buggy. Don't be surprised if your MP4 files show up with zero size.
When you use a card reader, the CF card shows up as "E:", or whatever drive letter Windows gives it -- in other words, it has a drive letter. You can access the contents from Windows Explorer, or Resolve's Medai Pool, including all file types, as far as I can see. In all my experience the files copy over to my hard drive just fine.
I hove no idea how MacOS would handle this. I don't have a Mac.
I hope this helps.
