@Zeruat Not my solution, but try this
"1) Boot up CWM and
2) then pull the files"
1) Download CWM, rename it to cwm.img and place it in the same directory as your fastboot executable;
2) Reboot you device into fastboot mode and connect to your computer;
3) Make sure your computer sees your device by typing: fastboot devices
4) Boot CWM by typing: fastboot boot cwm.img
5) Pull all the files from /sdcard by typing: adb pull /data/media"