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I use two HDDs (one internal to my laptop, and one external) that I normally backup on to a third backup hard drive.

Is it possible to do a backup of just one of the non-backup-drives so that it doesn't take as long to back up?

If so, will I be able to re-include the external hdd? In the next backup?

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What kind of backup? Is it a Delta backup, or just a regular image? – digitxp Aug 19 '10 at 23:32
Complete PC Backup. – leeand00 Aug 19 '10 at 23:51

The W7 backup automatically selects the OS partition and cannot be de-selected.

This is why I use Acronis, back up any partition or disk you wish.

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I've been using the freeware Cobian Backup and highly recommend it.

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