Assuming you have the device which uses that fw you linked (Note that Alpha 200i EU and US both have HWID 3433), it's not surprising that nothing was dumped. That would be because the folder naming of "3508" likely doesn't match the actual device HWID of 3433. You need to confirm before trying again. Additionally, if the device is MTP capable with a hidden RWFS partition then it will write to 2/: for the media card and 1:/ will write to RWFS. Additionally, the non-vol region will be 154 not 41 in that case.

WARNING: The chances of bricking a device by flashing the incorrect Ldr.bin are dire and most probably will result in a permanent hard-bricking. If your device indeed did have HWID 3508 it would now be bricked if the Ldr.bin was flashed to region 12.

You should check the actual HWID of the device itself before going further, read here: [Only registered and activated users can see links. ]