[mingfa]

Hi, need your help.
Searching through forums but still not sure, that I understand correctly
specifics of Calibre back-up.
I've got one library at Calibre; it contains over 30,000 of books. I didn't understand the system of backing up, so use simple copying of my library folder to the external drive.
The number of my books is so huge because I send to Calibre all books collected through the years on different computers, phones, flash drives, cloud storages, etc. I'm looking through my books, deleting duplicates, changing author's names, filling tags and doing many other things - so my library is permanently changing.
If I use the function of one way synchro in Total Commander (from laptop to external drive), can it broke the external copy or not?