[j.p.s]

Originally Posted by ilovejedd

Same sdr folder. Just named mbp1 for MOBI and yjr for KFX

Originally Posted by PoP

Just to note that (similar in content to *.azw3r and *.azw3f), for *.kfx books, *.yjr and *.yjf files are created in the *.sdr folder.

Thanks to you both.

And it looks like on older firmware, mbp for MOBI.

I played around with them a bit and their formats for highlights and notes are all different and deserve their own threads. After they are all sorted out, maybe someone can start a thread for an application that automatically handles all of them. In all cases, there is "junk" between the notes header and the text of the note.

I might edit this post later to show excerpts inside spoiler tags.