If you are working on Linux, the fastest way is to create a bootable USB is to run the command:
dd bs=1M conv=fdatasync if=./proxmox-ve_*.iso of=/device/name
Modify the file name and path in
if=./proxmox-ve_*.iso and make sure to provide the correct USB device name in
To find the name of your USB stick, run the following command before and after plugging in the device:
Compare the output. The additional entry in the second output is the name of the device.