Originally Posted by kovidgoyal
You can try the "save to disk in single directory" option (click the arrow next to the save to disk button).
I shortened excessively long titles and attempted to backup to a single directory and got this error twice.
'NoneType' object has no attribute 'split'
Traceback (most recent call last):
File "main.py", line 697, in save_to_single_dir
File "main.py", line 711, in save_to_disk
File "calibre\gui2\library.pyo", line 156, in save_to_disk
File "calibre\library\database.pyo", line 1416, in export_to_dir
AttributeError: 'NoneType' object has no attribute 'split'
Where is the database file located and maybe as a temporary solution I can just back that file up to my external drive. E:\ is an external drive 1TB if that makes any difference.