an NTFS partition was not mountable unless dismounted from the automatic mount point; as far as I can see, this is not the case for vfat or ext4 partitions.I tried changing permissions of /media. Not solved.I did copy a udev rule for setting permissions---something above my level of understanding, however. If anything, the situation was worse.It has been very frustrating to google for 2 hours on this probably very simple problem. I think the solution is just to mount them manually. Still, it would be helpful to automount them, or mount via fstab. I have not had success mouting by label, and one does not know in advance whether some usb flash drive might preempt these drive designations.BTW I am pleased to be running a Debian system again after some years. It took a good deal of work, though, to get it set up on an iMac with a broadcom wifi adaptor!