01-13-2014 07:23 AM
Those ".ch" file types are not generated by the BlackBerry, I don't know where you got them from.
If you're fearful you might be about to delete something needed later, backup or copy ALL of your media card to a PC folder. You can always restore the material copied if you find you need it later.
PIN: C0001B7B4 Display/Scan Bar Code
PIN: C0005A9AA Display/Scan Bar Code