Cherry picking Drew's change to the dev branch.
cot: ask for permission to delete backups

Change-Id: I2bf1e1cb0e2d6900bf4a1a0794db9f04f599276e
Signed-off-by: Drew Walton <drewwalton19216801@gmail.com>
(cherry picked from commit 7b307c986233ab31dfeeddf3ee0c913ec2662492)