You have to remove the books from your amazon.com account or it will still show that you dont' have enough memory in your kindle. I had to delete mine off of carousel for the kindle and delete it from my amazon.com account to free up enough space to download new books.
If you are trying to download a large book then it will not download but maybe 2 pages.
make sure you back up your kindle to your icloud account before deleting so that if you want the book back you can redownload it.
All books are not the same size so 10 books might not be enough memory still. so depending on how many books you have on there you have to keep going. if you don't want the books anymore delete them from your amazon.com account also. once again back up on your icloud.
I am not trying to download any new books. The books are already there and have been for a
long time. I just want to open an existing book.
I see what you are saying, have you synced your kindle up to your computer lately?
No. Just tried the Sync & Check for items on the Kindle, but didn't do anything. Just took me back to
okay so it still wants you to delete books even though you have not downloaded any.
okay you will still have to delete more books then the original 10 that you have deleted. since it will not sync and still takes you back to the home page then it is still to full of memory to do anything.
how many books do you have on your kindle?
depending on size you will have to delete at least 25 to 50 more depending on how many you have store on it. memory is ram so if you have 4 or 8 gb of ram then your kindle doesn't have enough memory for you to open your books if they are very large.
usually the original kindle can hold about 1500 books but if there are some large ones in there of course it will not be able to hold that many especially if some are pdf and some have pictures.