upgrading Kobo to Clara BW or Nia

Hi all,

I'm currently using an old Aura Kobo and side loading epubs through Calibre 7.12 on a Windows 10 computer with a USB cable.

I'm considered upgrading my Kobo to either a Clara BW or Nia although I have concerns about database corruption with side loading through a usb port and the performance of Calibre with the Clara BW.

I could buy a Nia as my husband did a year ago (he side loads his epubs through usb from a Unix machine with an older version of Calibre) although I'd prefer a newer Kobo.

Are there still issues with the Clara BW and database corruption when side loading books via USB? (I don't usually transfer huge numbers at once)? How does the Clara BW work with the current version of Calibre (7.12)?