trying Making to make a bootable USB stick. using Debian 9

I am trying to make a bootable usb with Debian 10.5 on the USB stick. I am using Debian 9.12 on my computer and it is not working. Are you able to help me please. Below is what I typed into terminal and what has happened
root@ike:~# *cat /etc/debian_version
9.12

therefore I am using Debian 9.12
root@ike:/home/ike/Debian105# ls
debian-live-10.5.0-amd64-gnome.iso *debian-live-10.5.0-amd64-gnome.iso.part *f.txt
therefore the program I want to put on the USB is in directly root@ike:/home/ike/Debian105#
root@ike:/home/ike/Debian105# lsblk

AME **MAJ:MIN RM **SIZE RO TYPE MOUNTPOINT
sda *****8:0 ***0 232.9G *0 disk *
sda1 **8:1 ***0 *23.3G *0 part /
sda2 **8:2 ***0 **9.3G *0 part /var
sda3 **8:3 ***0 **3.5G *0 part [SWAP]
sda4 **8:4 ***0 ****1K *0 part *
sda5 **8:5 ***0 **1.9G *0 part /tmp
sda6 **8:6 ***0 **195G *0 part /home
sdf *****8:80 **1 **3.8G *0 disk *
sdf1 **8:81 **1 **3.8G *0 part /media/ike/PKBACK# 001
sr0 ****11:0 ***1 *1024M *0 rom **
Therefore USB is sdf

root@ike:/home/ike/Debian105# dd if= debian-live-10.5.0-amd64-gnome.iso of=dev/sdf bs=1M; sync *status=progress

dd: unrecognized operand debian-live-10.5.0-amd64-gnome.iso'
Try 'dd --help' for more information.

sync: error opening 'status=progress': No such file or directory

root@ike:/home/ike/Debian105#

Regards Isaac Shields
My email:- nejekipl@bigpond.com