Q: I have two external hard drives. One is my Time Machine backup drive.  The other I use for external storage of files (documents, photos, movies, etc).  Can I set Time Machine to backup BOTH my Mac hard drive and my other external hard drive?

Yes, if it's formatted for a Mac.

See Time Machine - Frequently Asked Question #32 for details and considerations.

Are you running OS 10.5.8 or is that a mistake and are you running 10.8.5 ????

If it is Leopard, I am not sure that you can have 2 disk at the same time for TM, do not count on it.

I tried to back up my external LaCie 1TB Hard Drive (photos) to my external LaCie 2TB Time Machine. It won't do it. If anyone knows how to do it, please give us steps. Thanks!

I recommend that you purchase Carbon Copy Cloner.

If you have a mac you can get great help from screencastsonline.com

I does cost a little but it is well worth it. You can try it for free but the full list of videos is only availbe once you have signed up. There is any example of carbon copy cloner in the members area.

Yes you can make multiple backups on one hard drive, for example if you’ve 1TB hard drive installed in your PC and you’ve two Mac Machines with 500GB drive each then you just make two backup images with size of 500GB each.

http://www.halfspot.com/use-your-pc-hard-drive-for-time-machine-backup/

This is an old thread.

You responded just to say you are not sure? ******** like you make it much much harder to find the actual answers to these questions.

No, read what I said.

Old threads are not followed up generally, so if you want help with an issue, you reach many more people when you start a new thread.