Huge "system data" file on SD card I am running out of space in my SD card on Android ICS and I noticed that a huge file "System data" is taking up to 500MB. Is this normal? How can I reduce its size?
I have never seen such a file on ICS.

You could simply try to move the file to your PC and see if everything works. I think it's pretty safe to do so, because critical system files are usually not placed on the SD card.