I'm using Paragon HD Manager 11 suite & whenever I've tried to copy a partition to an external drive the last few days, I get this error message right at the beginning of the backup: "can't open/create file". At first I thought the problem might be due to a disk error in the external drive I was using so I ran chkdsk but no problem were found. Then, I tried copying a partition to my other external drives & the same thing happened. OTOH, I am able to copy partitions to the 2nd HD in my PC. I've run chkdsk for my C & program partitions but it didn't find any disk errors there either. Does anyone have any ideas about what can be causing this error message with all my external drives & what I can do about it? TIA.