Backing up one external hard drive to another in time machine?

I have a 1 tb external hard drive I'd like to keep backed up to an identical external hard drive. Can I do this using time machine?
I'd like to do this separately from the standard time machine backup I'm doing of my internal hard drive, which backs up to another external one.
Not sure how clear this is but any help would be appreciated. I'm on a MacBook Pro.
Thanks!

I'd like something that'll only move over the files that are new. My guess is Disk Utility.app doesn't do that. Maybe Retrospect?
You're right - Disk Utility doesn't - it will do a full-disk copy, not just an incremental change.
I can't recommend :: shudder :: Retrospect, though. it used to be the bees-kness in Mac backup but it has seriously lost its way, with too many users complaining of it being a resource hog and not being able to restore data, which is kind of important for a backup utility.
Given your requirements, your best bet may be Carbon Copy Cloner. It will do full-disk as well as incremental backups to create a bootable clone of your system.

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How do I back up one External Hard Drive to another?

I have two identical partitioned WD External Drives. Drive 1, Partition 1 is a Macbook Pro Time Machine backup. Drive 1, Partition 2 is for photo & video storage uploaded directly from the camera or disk (so I don't overload my internal storage). How do I backup Drive 1, Partition 1 & Partition 2 onto the partitioned External Drive 2?

I should back up my Internal Hard Drive directly to each of the 2 external Hard Drives, right?
Yes.
Since the External HD's are typically not plugged into the computer, should I not use Time Machine?
When the drives are connected, the backups will take place. If you rarely connect the drives, then you should also back up over the network to a Time Capsule, a hard drive connected to a current-model AirPort base station, or another Mac via File Sharing.
See also:
Mac Basics: Time Machine backs up your Mac
iPhoto: How to move the Library folder to a new location
iTunes for Mac: Moving your iTunes Media folder

Cannot copy itunes from one external hard drive to another.

I have been using an external hard drive for storing my itunes and iphoto for a while now. I have never experienced any issue copying it to a larger drive for back up. My current drive is only 80 gigs (LaCie) and is almost out of space. I bought a new g-tech 500gig mini drive to replace it. Every time that I try to move the files from the old drive to the new one, I get the following error message 10 gigs into the transfer-
[You can’t copy “Music” because it has the same name as another item on the destination volume, and that volume doesn’t distinguish between upper- and lowercase letters in filenames.]
There is nothing on the new drive. I even took the iphoto folder off to make sure there was nothing on it to cause this message.
Is this an external drive issue or a Finder issue? I had no issue moving the iphoto library onto the new drive, fwiw...

I am getting exactly the same problem. It's just with the music folder. I dont get the problem copying other folders over. It gets about 22gb into copying 100gb from one external hard drive to another then I get the error message "You can’t copy “Music” because it has the same name as another item on the destination volume, and that volume doesn’t distinguish between upper- and lowercase letters in filenames." So I tried just copying the itunes folder and I still get the same message. Any advice welcome.

I transferred my iTunes library from one external hard drive to another and added more music on the same day. How do I get rid of my duplicate files without going through them one by one which would take forever?

Please help. I have transferred my iTunes library from one external hard drive to another plus added additional music now I have duplicates of the same music in many albums. How do I delete the duplicates without going through them one by one which would take forever? I understand how to get the "show exact duplicate" feature up on iTunes but, because they were added to the library on the exact day I can't seperate them I'm that manner. So each duplicate is right next to eachother in the exact duplicate screen.

My DeDuper script is designed to help clean up. See this thread for background.
tt2

How do I move my iphoto library from one external hard drive to another?

how do I move my iphoto library from one external hard drive to another?

Drag it there in the Finder and then launch iPhoto with the Option key held down. Point it to the new instance of the library.
(58012)

Can't get LR3 to import photos from one external hard drive to another?

I'm wanting to move thousands of raw photos from a folder in one external hard drive to another folder in a different external hard drive so all my photos are in one photo folder instead of two. I've gone through the importing routine inside of lightroom to move the folder over to the new hard drive. However, the photos don't move because they still show up on the old hard drive and not the new one. What's weird is when I try to import it again, the grid view shows all the photos I'm wanting to import and when I move my cursor over any of the photos they are faded out and it says the photos are already imported. However, if this is true why aren't they showing up in the new folder on my new external hard drive? I know the new external hard drive works fine because I've successfully been putting all my newer photos there since I started using LR about one year ago. The one's I'm trying to move over are older photos I shot try to using LR.
I'm stumped and need some help. Thanks in advance.

You wrote
"Are you saying while I'm in LR just grab the folder I want to move and drop it into the new hard drive"
Yes, that's the way to move photos & folders from within LR.
LR will then update its catalog with the new location and everything should be fine.
Importing is not a good way for moving photos / folders. Since the photos are already in the catalog you had to uncheck <Don't import suspected duplicates> or all the photos will be greyed-out in the import dialog. If you did that LR would import the photos from drive A and put it on drive B. But they would still be on drive A, so you'd have the photos on both drives and would have to delete them on drive A.
But more important: By default LR saves all edits in the catalog, they are not saved with the images themselves. That means by doing an import instead of a drag-and-drop move you'd lose your edits.
You can save your edits to xmp, a side-car file that is stored together with the image file, and the xmps would be imported. But LR does not store everything as xmp. For instance Virtual Copies, Collections, Stacking are saved only in the catalog, so by doing an import you'd lose these things.
Unless you know LR very well, it's best to use the Import Feature only for images that are NOT yet in LR.
And another thing: Before doing major operations like moving big amounts of photos, it's best to backup your catalog first.
WW

How do I move data on time machine from one external hard drive to another

How do I move data on time machine from one external hard drive to another?

Although the documentation says you can copy Time Machine backups in the Finder, it's very slow and sometimes doesn't work at all.
Launch Disk Utility, open the built-in help, and search for the term "Duplicate." Follow the instructions. Turn Time Machine OFF in its preference pane while copying the volume.

I bought a new external hard drive for backups, but time machine won't do a full back up. I think it is remembering backing up onto previous external hard drives, which I don't own anymore. How do I do a new full backup?

I bought a new external hard drive for backups, but time machine won't do a full back up.
I think it is remembering backing up onto previous external hard drives, which I don't own anymore. How do I do a new full backup?
When I bought the new (used) iMac, I also bought an external hard drive for backups. It worked fine, but my husband stole it.
Then I bought a new external hard drive (Seagate) and it worked fine for three weeks, then died.
So I just got a new external hard drive, which was put together from an internal hard drive and a hard drive enclosure.
Time machine did the first backup today, and it should have taken 9 hours like it did on the previous first time full back up. Instead, it took 30 minutes. That can't be right. I want to start over and do a full backup to make sure everything gets onto my new external hard drive, but I can't figure out how to do that. Please help.

Triple-click anywhere in the line below to select it:
tmutil compare -E
Copy the selected text to the Clipboard (command-C).
Launch the Terminal application in any of the following ways:
☞ Enter the first few letters of its name into a Spotlight search. Select it in the results (it should be at the top.)
☞ In the Finder, select Go ▹ Utilities from the menu bar, or press the key combination shift-command-U. The application is in the folder that opens.
☞ Open LaunchPad. Click Utilities, then Terminal in the icon grid.
Paste into the Terminal window (command-V).
The command will take at least a few minutes to run. Eventually some lines of output will appear below what you entered.
Each line that begins with a plus sign (“+”) represents a file that has been added to the source volume since the last snapshot was taken. These files have not been backed up yet.
Each line that begins with an exclamation point (“!”) represents a file that has changed on the source volume. These files have been backed up, but not in their present state.
Each line that begins with a minus sign (“-“) represents a file that has been removed from the source volume.
At the end of the output, you’ll get some lines like the following:
Added:
Removed:
Changed:
These lines show the total amount of data added, removed, or changed on the source(s) since the last snapshot.

What brand external hard drive is best with time machine

what brand of external hard drive works best with time machine?

Contrary to the other two replies, I will relate what I've read here: WD drives are fine, but their (cheap?) enclosures are subject to failure. Some buy a bare WD drive and install it in an Oxford Chip external enclosure (OWC / macsales.com would be one source). And, I have two LaCie Quadras and one OWC Mercury Pro - both are generally recommended here. If you want it bootable, most WD drives do not support it:
http://wdc.custhelp.com/app/answers/detail/a_id/1787/related/1/session/L2F2LzEvd GltZS8xMzUxNTIzMzIwL3NpZC9ueUFYc1g5bA%3D%3D
Please note: it's good to have an external hard drive which has its own power supply and, as mentioned, FW 800 or USB 3). You also do not need any software that comes on the external - you will most likely need to format it anyway because most come formatted for Windows, but that is easy using Disk Utility.

Can I view photos and movies from my external hard drive? I used Time Machine and a WD Passport for backup. Since my drive on my MacBook Pro is filling up I was planning to delete some of the movies and photos.

Can I view photos and movies from my external hard drive? I used Time Machine and a WD Passport for backup. Since my drive on my MacBook Pro is filling up I was planning to delete some of the movies and photos. I wanted to see if I could view them from the hard drive. Thanks

Hello, eco1.
Thank you for visiting Apple Support Communities.
This sounds like you are wanting to move your iTunes media folder to an external drive and have iTunes this folder from this location. If this is the case then I would recommend taking a look at the article below.
iTunes for Mac: Moving your iTunes Media folder
http://support.apple.com/kb/ht1449
Cheers,
Jason H.

Can Time Machine back on one external hard drive (work files) to another external hard drive (back up)?

Can Time Machine on a Mac Book Pro 10.5.8 back up an external hard drive (working files) to another external hard drive (WD dual backup)?

I have Mountain Lion here ready to upgrade, but I'm scared of what will happen - there's always something when you upgrade, but I guess that's for a different post!
Yes, it's a different post, but let's make a comment any way.
Your power pc apps will not work when you upgrade to Mountain Lion. You will have to replace all the apps you use.

I get error 8062 when trying to copy files from one external hard drive to another. It starts out copying files, but after 10 minutes or so it stops and I get the error 8062. The hard drive tech support says the problem is in my Macbook Air.

I cannot copy my doc and photos and videos from one external hard drive to a second external hard drive -- both plugged in to my MacBook Air -- I get Error 8062 and the copying (which seemed to be going on for 10 minutes) stops and nothing gets copied.
As any Macbook Air owner knows, there is SO LITTLE storage capacity on the computer that you have to back up big files onto an external hard drive to avoid getting the other annoying error that says you have no more memory/storage capacity/whatever the proper term is, and you cannot use the computer.
Backstory: Before this error cropped up, I had backed up lots of files to an external drive and then removed them from my computer. But then the external hard drive got corrupted and I could not access my entire photo library. Had to pay $850 to Kroll Ontrack to recover those files. I have now bought 2 new external 1 Terrabyte hard drives as protection against another such disaster. BUT I cannot copy the files from the first hard drive where all my reovered files now sit, to another backup hard drive.
Feeling vulnerable. Please help.
SusaninNY

From the menu bar, select
 ▹ System Preferences ▹ Energy Saver ▹ Power Adapter
and uncheck the box labeled Put the hard disk(s) to sleep when possible, if it's checked.
If the drive has more than one interface (USB, FireWire, Thunderbolt, eSATA), try one of the other interfaces.
Check that the data cable is securely inserted at both ends.
Try a different cable.
If you're connecting the drive through a hub, connect it directly to a built-in port on the Mac.
If you're connecting it directly, try a different port.
Disconnect all other devices on the bus, or as many as possible.
Test the drive with another Mac. Test another drive with this Mac.
If the drive is bus-powered, but has an AC adapter, connect the adapter.
Start up in Safe Mode and test.
If the drive doesn't work under any of the above conditions, and if another drive does work with the same Mac, then the drive has failed. You may be able to salvage the mechanism by removing it from the enclosure and installing it in another one, or in a drive dock.

Can Time Machine back up an external hard drive plugged into a Time Capsule

I have iTunes and iPhoto libraries that have outgrown the hard drive on my laptop so I've moved them on to an external hard drive. Since I'd like to move around the house with the laptop, I've plugged the external hard drive in to the Time Capsule so that the files on the external hard drive will be accessible on the network. Now that my really important files live on an external hard drive, I want to back it up.
Time Machine is backing up my laptop's internal hard drive to the Time Capsule drive, but I can't seem to figure out how to make Time Machine also back up the external hard drive that's plugged in to the Time Capsule.
Is this possible?

I understand that [Chronosync|http://www.econtechnologies.com/pages/cs/chrono_overview.html] ($40 U.S.) can do that, but I've never used it.
If you do that, you'll want to back it up to a disk image on the TC's internal HD, or a separate HD. See #Q3 in [Using Time Machine with a Time Capsule|http://web.me.com/pondini/TimeMachine/TimeCapsule.html] (or use the link in *User Tips* at the top of this forum) for details.

Using the same external hard drive to host a Time Machine partition + a test recovery partition: no longer possible?

In 10.7, I used to have one external hard drive with two partitions:
1) a Time Machine partition that I used to back up my internal hard drive;
2) another partition that I used once a month as a target partition to test the restoration of my Time Machine backup (because having a backup is a good first step, but regularly making sure it could be usable for a full recovery in case of a failure of my internal hard drive is important as well).
After upgrading to 10.9, my first backup restoration test failed with the error message "An error occurred while adding a recovery system to the destination disk." I found the following discussion:
https://discussions.apple.com/thread/4370294
which suggests that I need to make sure my external hard drive is formated using GUID and/or that I need to install 10.7 on the target drive. I checked in the Disk Utility, and indeed my external hard drive is formatted using Apple Partition Map rather than GUID.
I also found the following KB article:
http://support.apple.com/kb/HT5911
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Answering my own question: I managed to perform the restoration test on a second external hard drive. The trick was to make sure it was partitioned using GUID. I didn't even have to first install OS 10.9 on the second partition (I had an old restoration of 10.7 on there).

HT201250 can i back up my iTunes on one external hard drive to another external hard drive through time machine?

I have my itunes on an external hard drive which I use on my macbook. Can I back these files up through time machine onto a second external hard drive?

For TM yes, for another backup program running on the mac yes. You can avoid the NTFS issue by installing a NTFS driver in your mac: there are two proven ones: Paragon and NTFS-3G. These drivers make it possible for a mac to read and write NTFS formatted drives.
But it will not help TM (I am not 100% sure about that), but other backup apps it will help.

Backing up one external hard drive to another in time machine?

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