Please note:

Setting a sync path and syncing to a file system is not saving the notes to a different path.

Notes are locally kept in an sqlite database and the location can only be changed by either using the unsupported --profile parameter or using symbolic links.
If you want to backup your notes, you will have to use File -> Export -> JEX.

Using a local filesystem sync target is a bad idea, if you do not know what you are doing. It will most likely mess things up for you. Never, ever touch any files in that sync target directory.
If the sync target is gone or files in there are deleted, all your notes in the database or the notes corresponding to the files are gone forever!

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