Ok, I found some cables to try. The first one didn't work, but I think it was trying to connect. My computer would beep every couple of seconds - nothing would show up on calibre but a file kept showing up and then disappearing in File Explorer - I don't remember the name (it wasn't Kobo but Drive D or something like that). I was finally able to right-click on that and got an option to eject so I hoped for the best and did that.
I tried one more cable and this time it did connect (and showed up in Calibre) but it showed that there were jobs running. There were 6 jobs but only 4 completed. "Send metadata to device" and "backing up Kobo device database" did not (I will put the error messages in spoiler). And it took almost 10 minutes for "get list of books on device".
I'm not sure if I messed it up with the first cable or now, but I've about exceeded my level of knowledge and what I am comfortable experimenting with. Could there be a problem with my Kobo, or is it still probably something with my cable/computer, etc? Thanks for any ideas!
Spoiler:
IOError: disk I/O error
Traceback (most recent call last):
File "calibre\gui2\device.py", line 87, in run
File "calibre\gui2\device.py", line 578, in _sync_booklists
File "calibre_plugins.kobotouch_extended.device.driver" , line 517, in sync_booklists
File "calibre\devices\kobo\driver.py", line 1004, in sync_booklists
File "calibre\devices\kobo\driver.py", line 2649, in update_device_database_collections
File "calibre\devices\kobo\driver.py", line 3434, in set_core_metadata
apsw.IOError: IOError: disk I/O error
[Errno 22] Invalid argument
Traceback (most recent call last):
File "calibre\gui2\device.py", line 87, in run
File "calibre_plugins.koboutilities.jobs", line 199, in do_device_database_backup
File "shutil.py", line 279, in copyfile
File "shutil.py", line 185, in _copyfileobj_readinto
OSError: [Errno 22] Invalid argument