HT201250 can I back up files from one hard drive to the other hd using time machine?

I would like to back up my files automatically from one hard drive to another skipping the computer backup. If anyone knows anything on how to set it up, I would like your help
Thanks!
Ruta

If you want to copy one external disk to another external disk, and you want an exact copy, then you might consider Carbon Copy Cloner or SuperDuper.  Either of which will make an exact duplicate of the disk.
If you wish to have Time Machine include an external disk as part of your normal Time Machine backups, that means just including the external disk as part of your Time Machine backups.
If you mean run a One-Off backup of the external drive to another external drive using Time Machine, I would go with CCC or SuperDuper.
If you could give some more details about what you are trying to do, how often you want to do this, what kind of information is on the drive being backed up, how often the data is being changed and thus how often you want to do this disk to disk backup, whether you want to have the incremental backups offered by Time Machine, or if you just want a copy, and anything else you can think to tell us about your situation and the problem you are trying to solve.

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