Hi,
please note they are under the ~/.cache for purpose. As the data is on
a remote server, it can be always downloaded from there, and more
precisely the local cache is synchronized with the server content
periodically - as it’s done also on open of the book/calendar, whatever
you save in the ~/.cache/ can be void after the synchronization with
the server content. That’s the reason why File->Back Up Evolution Data
skips the ~/.cache/evolution/ directory. You can call
/usr/libexec/evolution/evolution-backup from a command line to create a
backup of your content into a single file.
Bye,
Milan
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