Hello!
In Documents folder, inside my Kindle Paperwhite, there's a folder named "My Clippings.sdr". Inside of it there are two files:
1 - Myclippings298(...).mbp1
2 - Myclippings298(...).mbs
At least what I know is that it seems to be some kind of metadata files of MOBI e-books, but the sideloaded e-books that I have I manage them through Calibre, and they're all AZW3. I even used .MOBI before, but not anymore.
When Calibre creates a folder of a new e-book, inside of its folder the metadata files appear there with three formats: .apnx, .azw3f and . azw3r, and I'm only using AZW3 files for now.
I also have some documents in MOBI format, but they're all in the cloud. I don't know if it has something to do with it.
My question is: What are these files and are they related to some sideloaded e-book via USB or what? I'm asking because I want to make backup of my AZW3 e-books, specially notes made on my Kindle, and I fear that I can lose data if I don't save these .mbp1 and .mbs files, since I don't know what they are.
I deleted these files and it seems that I haven't lost any data, however, I'd like to understand what it really is and if I need to worry.