Ok, here's my attempt of a manual for proper USB mounting with a Rockboxed iPod Classic on a Windows computer:
- Check your antivirus for automatic pre-scanning of portable drives, turn this stuff off.
- Check other (audio)software that might interact with drives with music files on them, turn them off. Use the standard Windows Autoplay or wait for the drive to show at (This) Computer. Remember that it's not a flash drive (instant mount), so it might take up to 30 seconds or so before being recognised.
- Use an original Apple cable, no aftermarket stuff.
- Plug the cable directly into a USB port on the motherboard, do not use a USB hub or USB cable splitter.
- Boot your iPod before connecting. Wait for Rockbox to be fully loaded and wait for the harddisk to be idle again (put the iPod next to your ear so that you hear that the head is not seeking on the drive anymore) before connecting the cable.
- And again, wait a little bit to get it recognized. When you see the drive popping up at (This) Computer/Hard Drives, the logo will be in grey first, don't click yet but wait until it's normal and below it should then show the x GB free / x GB total with the blue bar.
If this doesn't work then try again with the backup build from the EmCORE menu. Please share your experiences!