I had the same problem, but got the answer from another on this forum. The option you're looking for is not where you think it is. You must go...
You're right! Not only that, but you must FIRST set up the backup location in order to format your options. Not at all clear in the manual....
This is the direct statement from the Help file in TI-10. "Create differential backups" - Having chosen this parameter, check the Create a new...
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