The new firmware is 341MB in size (over 100MB larger then RC2 was), and the onboard /cf/ of a dual-partitioned SRX-240H is only 342. It doesn't seem possible to remove enough from /cf/ to do an upgrade without a USB key... and the device is in a remote data center in another city
request system storage cleanup still leaves 42MB of data on /cf/... 41MB too much.
I upgraded from the 10.0 that shipped with it, to 10.4RC2, and now can't upgrade again.
Thinking of rolling back and trying to go from 10.0 to RC3 directly, or shipping a USB key to the data center =/