Tried to burn iso into usbstick -> bash: /dev/sdd1: Permission denied

Hi,
I tried to download iso directly from web and burn into usbstick, but all tries failed.

trial 1;
Code:$ sudo curl -L https://download.manjaro.org/kde/21....9-linux510.iso > /dev/sdd1bash: /dev/sdd1: Permission denied

trial 2:
Code:$ sudo curl -L http://cdimage.debian.org/debian-cd/...64-netinst.iso | sudo dd of=/dev/sdd1
% Total % Received % Xferd Average Speed Time Time Time Current
Dload Upload Total Spent Left Speed
0 0 0 0 0 0 0 0 --:--:-- --:--:-- --:--:-- 100 278 100 278 0 0 2647 0 --:--:-- --:--:-- --:--:-- 2647
0+1 records in
0+1 records out
278 bytes copied, 0,11835 s, 2,3 kB/s
Question1:
Do i need to mount the partition of the usbstick to be able to burn into the disk ? i think no need to mount right? since "dd" burns to the whole storage instead of partition.

Question2:
Can dd burn to a certain partition of a usbstick ?

Question3:
Since dd burns to the whole data storage device (i think it is), how about the ">" in "trial 1" above ?

Question 4:
What happened ? why both trial 1 and 2 above both failed (in different manner)