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#11
File History should be able to find the second internal drive and the external drive as available to use. One possible reason for the drives not being available is that the drive, or a folder on the drive, is included in the folders being backed up. Check that the list of folder to back up does not include a folder from one of the drives you want to use.
If you still can't find a drive to use, try this workaround. File History can also use a network drive. That network drive doesn't have to be on another machine, it can be a drive being shared by the same PC. You could create a folder on your second internal disk, the G: drive then share it. In Control Panel > File History click 'Select drive' (selecctionar unidad). Then on the select drive screen click 'Add network location' then browse and find the share on your PC.