My transfers from SD to PC.
K-x goes into K-x -> Year -> quarter of year -> month number -> original folder name
K-r goes into K-r -> Year -> quarter of year -> month number -> original folder name
Files from those folders gets imported to LR. LR creates new copies on a different drive.
Lightroom doesn't care about cameras when it creates hierarchies though. so, it will mix the files within same folder, if shot on same day.
My LR renaming scheme was: ziYYYYMMDD_PHOTONUMBER.dng
Changed it to: zi_YYYYMMDD_HHMMSS_PHOTONUM.dng
Don't think I'll be changing cams within a sec - but could happen!
The problem in this case was a bit special though. It imported some files with dupe filenames but not all. I'm beginning to think I might have changed something by accident in one or more of the exports.