Hi all,
I apologize if I'm not posting on the appropriate forum, but I'm a bit lost

Please let me know where I should submit my question if I'm in the wrong place.
I've been using Calibre to upload ebooks to my Kindle Paperwhite for a few months without problem.
However, since yesterday, the ebooks don't appear on the Kindle, though they are present on the drive in the "documents" section. I've checked under "All Items", they aren't there either.
I've have tried restarting the machine, defragmenting, az3 format instead of mobi... Nothing has worked so far.
I know I can send the ebooks via mail or the app, but I've many books and Calibre has the advantage to organize the library on the Kindle.
Any idea why this is suddenly happening?

Thanks a lot in advance for your help!
Samba
Samba