Strange .sdr directories appearing in /documents?
I use Calibre to manage my Kindle Oasis, and have books in subdirectories inside /documents. For example, I have "/documents/Dozois, Gardner/Gardner Dozois (ed.) - Year's Best SF 26 - The Year's Best Science Fiction (2008).azw3" and an SDR directory "/documents/Dozois, Gardner/Gardner Dozois (ed.) - Year's Best SF 26 - The Year's Best Science Fiction (2008).sdr".
Recently I've been discovering bizarrely named empty SDR directories appearing in /documents for books I've recently read -- so for the book above, I end up with an empty directory called "/documents/Year's Best ~ion (2008)_89203011-3756-492e-83e6-7a0aa77f6017.sdr" -- basically the beginning and end of the series and book name joined with "~" and followed by "_" and a GUID.
Can anyone tell me why these directories appear and what they're for, and is it safe to delete them?
Last edited by Phssthpok; 08-24-2018 at 03:14 PM.
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