PRS-T1 Roadkil fails to do backup...

Hi everybody!

I'm brand new user of PRS-T1. Before rooting and playing with it I wanted to do full backup (I have couple tablets and know that it's important :).

So I put OS Firmware folder on microSD, booted into recovery. My Win 7 x64 sees reader and all discs.

When I start Roadkil, I select PHYSICAL DISC 5 (1.82 GB) on Store Image tab...

But at less than 20% I get message IMAGE CREATION FAILED.

Any ideas?

It's american unit and I just updated firmware to 1.0.05.11130.

I already tried two different cables...

Thanks in advance!!!