What are files aquota.group and aquota.user ?

Hello,

I've the new files "aquota.group" and "aquota.user" at the root of my volume and/or my shared folder because I've create a root share with the path '/' (to share the whole volume).

I've not enabled or set quota services!
Why these files have been created?
Do they come from OMV, OS or my sync from "USB Backup" or "Rsync" servcies?

Cron Daemon send me a notification about my Rsync daily job:

rsync: rename "/media/UUID/.aquota.group.3V061N" -> "aquota.group": Operation not permitted (1)
rsync: rename "/media/UUID/.aquota.user.AzPGCE" -> "aquota.user": Operation not permitted (1)
rsync error: some files/attrs were not transferred (see previous errors) (code 23) at main.c(1060) [sender=3.0.7]

Do I have to delete these files "aquota.group" and "aquota.user", or to change permissions on them?
Can I remove them without generate some system troubles?

Thanks for your help,
Chris

Ok thanks a lot David

It's my first practice with Rsync.
Can I add several (two here) "--exclude" inside "Extra options" field of my rsync job?

--exclude '.aquota.group.3V061N' --exclude '.aquota.user.AzPGCE'

Thanks,
Chris

Ok, it works with:
--exclude='aquota.group' --exclude='aquota.user'
inside "Extra options" field of the rsync job.