Avg pc tune up (find duplicates) on a portable hard drive?

Hello James,
We sincerely apologize for the difficulties you are currently experiencing.
Please be informed that it is recommended not to run scan for any external hard disk to find duplicate files in it. If you wish to try it out please take back up of the hard disk and go ahead.
Please feel free to contact us for any further assistance. Thank you.

I want to search for DUPLICATES on my portable hard drive… WOW! I am having a difficult time figuring it out…  Can't I use AVG PC TUNE UP???

Hello James,
We sincerely apologize for the difficulties you are currently experiencing.
Please be informed that it is recommended not to run scan for any external hard disk to find duplicate files in it. If you wish to try it out please take back up of the hard disk and go ahead.
Please feel free to contact us for any further assistance. Thank you.