Old versions od routerOS for RB 200

I have several RB 200 r3 boards and want to upgrade OS to 3.30. Most are running 2.8.24. I tried to drag 3.30 to the files folder but it would not let me. I down loaded the 3.30 from MikroTik I could not find an earlier version.

Do you upgrade the older RB200 differently than the newer 100,400 or 500 boards?

use X86 version and reinstall with netinstall if finish the time of upgrade

M.

here is list of all RoS

http://www.thavinci.za.net/Downloads/ROS/Unlisted/Mirror/www.mikrotik.com/download/

GCS why use old versions, when upgrade is free? Use Netinstall to upgrade to v3.30