[davidfor]

Originally Posted by WillW

Read it somewhere but can't remember where. Either way, if you've bought Kindle books on Amazon at any time, but generally use the Kindle offline with Calibre, then you take it off aeroplane mode, even for a minute, at your peril. The point being, the Amazon system interferes.
I've been using Kindle, and previously Sony, ereaders for years, and my setup was a mess, so I settled the matter by going to Amazon devices page and deleting everything from my Kindle for Mac, Kindle for Windows, and the Cloud. I have everything on the laptop, and double backed up, so nothing was lost.
It was a good move. Everything as I like it now. Except the whacky Kindle file system.

I haven't used a Kindle, but, based on what I have seen here, your experience was unusual. A lot of people seem to have sideloaded, purchased and emailed books on their Kindles with no issues.

Question - on the Kobo, can you have folders within folders? For example, My Bernard Cornwell folder on the Kindle contains several series of books, which all appear in the one folder. I'd like to have the Bernard Conwell folder, and separate folders within it for each series. As you would on your computer hard drive. Is this an option on Kobo?

Not in the Kobo interface. There is a book list with several filters (all, unread, read, reading, purchased, imported, overdrive, downloaded) and sort orders (recent, date added, title, author, series, file size and file type). Then there is an Authors list that shows each author with the number of book. Tapping the author opens the list of their books. There is also a collections list that works in the same way. Books can be on multiple collections. The filters and sorts work the same in a collection and an author.