How to export/import calibre backup to older computer?

[Lemur4000]

I need to move my calibre library and settings to a older computer with an older version of calibre installed. When I tried to import the previously exported calibre data, I get an error that the file is not valid:

calibre, version 3.48.0
ERROR: Not valid: The folder /Users/NAME/Library/Mobile Documents/com~apple~CloudDocs/Documents/Calibre Backup is not valid: The exported data in part-0002.calibre-data is not valid, version (1) is higher than maximum supported version. You might need to upgrade calibre first.

Traceback (most recent call last):
  File "site-packages/calibre/gui2/dialogs/exim.py", line 263, in select_import_folder
  File "site-packages/calibre/utils/exim.py", line 256, in __init__
ValueError: The exported data in part-0002.calibre-data is not valid, version (1) is higher than maximum supported version. You might need to upgrade calibre first.

Is there anything I can do to copy the backup over? Thank you!

[kovidgoyal]

Read the note at: https://manual.calibre-ebook.com/faq...ter-to-another

[JSWolf]

Originally Posted by Lemur4000

I need to move my calibre library and settings to a older computer with an older version of calibre installed. When I tried to import the previously exported calibre data, I get an error that the file is not valid:

calibre, version 3.48.0
ERROR: Not valid: The folder /Users/NAME/Library/Mobile Documents/com~apple~CloudDocs/Documents/Calibre Backup is not valid: The exported data in part-0002.calibre-data is not valid, version (1) is higher than maximum supported version. You might need to upgrade calibre first.

Traceback (most recent call last):
  File "site-packages/calibre/gui2/dialogs/exim.py", line 263, in select_import_folder
  File "site-packages/calibre/utils/exim.py", line 256, in __init__
ValueError: The exported data in part-0002.calibre-data is not valid, version (1) is higher than maximum supported version. You might need to upgrade calibre first.

Is there anything I can do to copy the backup over? Thank you!

The problem could be that because the database format has changed in some newer versions of calibre, you could be having a problem going back to an older version that doesn't support the newer database version.

However, if your computer is able to run Windows 10 64-bit, then install that instead of an old Windows 7. Then you can run the latest calibre 8.