Lightroom Folders management

Question

Good day
Adobe file structure and Microsoft.......
I may end up by having  problems with my files (Folders) with the way I do it now......... Is there a better road?
I shoot in RAW (Nikon) and transfer all photos to:
A) File: Raw from camera. Photo:  +/- 14 MB
Then I process images using " DXO"  and save photos to:
B) File: To process in Lightroom after "DXO"         Photo:  +/- 70 MB
Next all pics processed/altered by Lightroom are stored in
C) File: Already processed/Finished. Photo
Then I go to the Print module, work on different sizes and store as JPG under each sizes worked on.
Sizes:  4 x 6    or         8 x 10    or 12 x 18
D) store copies of photos under either the 4 x 6 folder or the 8 x 10 folder.
Results are a duplication of photos in many folders.....
Is there a shortcut?
I am aware of Keywords and Collection, very handy tools but I'm still under the concept of Microsoft Windows Explorer's structure of files.
Best regards and thank you in advance
Ray

Answer 1

If you have to use DxO, there's no way you can avoid at least two version of each photo: a) before and 2) after DxO.
But from this point on, I see no reason to create more copies. Once you've loaded a photo to Lightroom, all you need is on master file. There's no point in saving derivatives after processing and for printing in different sizes. Just use that master to obtain whatever output you want and when you need. So, in your case, C) and D) don't make sense.