We strongly encourage regular backups of your logbook. If your iPhone gets damaged or lost, you can then easily restore the logbook from the backup files.
Tip: Create a folder on your Mac or PC for your backups, then create subfolders with the dates of the individual backups, eg in the format YYMMDD. Later, this will help you identify the different versions.
Connect your iPhone via USB with your Mac or PC.
In the "Finder" or "File Explorer", open the iPhone folder
Click on "BLUU divelog" to reveal the 6 documents, in which your logbook is stored.
Select all 6 files
Drag and drop the files from iTunes to the folder on your Mac or PC to copy them.