I have connected a WD external HD to my 27 in i5 iMac and it seems to have caused the system to slow down. I see the spinning ball more frequently when it's connected it seems. Is this normal. I would like to have the HD connected all the time so that backups can happen frequently and automatically, but I don't really want to do so if it will negatively affect my system. Thanks for the input.
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2/22/10 at 6:04am