Mounting a USB drive on a synology system: "operation permitted for root only" although sudo was used

I want to mount a USB drive on my NAS synology Following those tutorials: https://askubuntu.com/questions/37767/how-to-access-a-usb-flash-drive-from-the-terminal https://linuxconfig.org/howto-mount-usb-drive-in-linux I could find the USB drive with the command:

$ blkid
/dev/mapper/vg1-volume_1: LABEL="2023.09.25-14:35:10 v64570" UUID="850bcccd-3982-43be-8857-ebd535c7ac92" UUID_SUB="998554af-d7c7-42de-b7fe-e0e153197119" TYPE="btrfs"
/dev/md0: LABEL="1.44.1-64570" UUID="da99711c-d604-4e26-ae5b-27d549704693" TYPE="ext4"
/dev/sdq1: LABEL="Samsung USB" UUID="64A5-F009" TYPE="exfat"

I Created a directory:

$ sudo mkdir /media/usb

and tried to mount the USB drive

$ sudo mount /dev/sdq1 /media/usb/
mount: /media/usb: operation permitted for root only.

I used the sudo command but the system still tells me that the operation is permitted for root only. What am I doing wrong?