[Quoth]

I looked at Dropbox. I don't use it or Google Drive. If I want to put files on the Internet I use my own hosting, but I can't remember the last time I needed to do it.

I looked at the the Dropbox support on the Elipsa and Sage:
1) You separately create an account or use an existing one. Kobo doesn't provide and account. It's purely support to use an existing account.

2) Dropbox needs good Wifi AND good Internet/broadband. I use Calibre exclusively to manage all my ereaders and Wife's. She had upgraded from a Kindle PW3 to a Kobo Libra Original last year. So I've concluded that Dropbox integration does nothing for me.

3) Did I read a method to add Dropbox integration to other Kobos?

4) Sync also does nothing except add software updates (separately for Elipsa/Sage Nebo based handwriting recognition. Usually I update Manually. My Kobo for proofing might be still at 4.26.x, basically Sync seems to be only for content bought from Kobo.

5) I'd love to disable Dropbox menu on Notebook export as it's not even set up. There would be one less step on exports.

I did look at the Dropbox setup and went to Kobo site and then Dropbox. I stopped when I realised Kobo didn't provide an account (I'd assumed related to the Kobo ereader logon).

I also have an old PC as a Linux Samba server in the attic for backups & sharing within the house. It no longer supports older Windows computers, but those are hardly ever powered on. Since 2016 all the laptops (four) are Linux Mint ending 25 years of Windows. Three infrequently used PCs have XP, Win7 and Win10 (usually no Internet), for games. Really only my youngest son uses one, the Win10 box which dual boots Linux.