I have the Elipsa since day one (24 June) and started reorganizing my library before, since I had many books in my Archives I wished to read or have at hand but couldn't before, either because of bulk (all my other Kobos have 8 Go storage, Elipsa 32), or readability on smaller devices (PDFs, kepubs with maps/tables etc.)
I always use the latest versions of Calibre (5.22, portable so 32bit) and its plugins, mainly Kobo Utilities/Kobo Touch Extended. I recently downloaded the regular 64bit Calibre to convert those rare epubs which didn't convert to kepub either within Calibre, or (the great majority) while transferred, but I have had only 10 epubs to copy for conversion up to now.
Transferring 4372 items/5.63 Go was a long and painful process. I had a few "database corrupted". The first time, disconnecting from my Kobo account wasn't enough, so I had to do a manual reboot. Subsequently, disconnecting/reconnecting was enough, but still some work. Today, I decided to write down the whole rigmarole:
- connection of Elipsa to Calibre: Elipsa and Calibre register 2039 items in common
- connection: Elipsa registers 3051, Calibre 3005; I manage to harmonize 45 items (all with multiple authors), but one can't be found (it has only one author)
- connection: Elipsa registers 4096 items of which 37 must be harmonized (36 multiple authors, 1 single author with two first names)
- connection: Elipsa registers 4372 items of which 15 must be harmonized
- connection, just to update metadata and reading positions, check the database and save it
Calibre seems to have difficulties with a few multiple authors, but none with many many more items with multiple authors, or authors with 2 or more first names.
The bulk of my transfers is done, and I hope I won't have to repeat the process soon.