Yes - sessions are not related to users. A user who logs in on two different devices (for example) will create two sessions.
There is no need to backup the sessions folder. It contains no information useful to restore a site. The only 'moodledata' directory you *have* to backup is 'filedir'; you can live without all the others.
There is no need to backup the sessions folder. It contains no information useful to restore a site. The only 'moodledata' directory you *have* to backup is 'filedir'; you can live without all the others.