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Old 12-14-2011, 03:13 AM   #5
mikeschr
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Posts: 63
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Join Date: Oct 2010
Location: Portland
Device: Scribe, Oasis, Clara
One reason you might want to use Calibre portable would be to access the Calibre library on any computer. There could be lots of other reasons.

To answer the original question, it sounds like a problem with your PC. I have no problem using my Kindle and another external drive at the same time. If you could try using both in another PC, that might provide some useful info for you.
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