What external hard drive will work for my 2012 mac book air

i dont want to spend money on one incompatible

Don't use any Western Digital HDD.
I recently bought this one, it is excellent:
Toshiba Canvio Connect 2TB Portable Hard Drive, Black (HDTC720XK3C1)
If you need a smaller capacity, then so be it. You can run almost any external HD with your Mac. Larger capacity drives, or arrays, require external power sources so as not to overload your USB bus power supply. Smaller, compact HD do not require this.
When you connect the drive, you simply need to reformat it using disk utility.
1) Open Disk Utility
2) Plug in your drive. Select the external HD in disk utility
3) Select the 'Erase' tab for the drive
4) Under 'Format' , select Mac OS extended (journaled) with a GUID partition table.
5) Name the drive, click Erase
You are good to go.

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Hello all -
similar situation. Unplugged external hard drive and all to take the laptop on a trip. On return, I plugged everything back in and keep getting this message:
Time Machine couldn’t complete the backup to “Iomega_Ext_Drive”.
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open time machine preferences. -
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Virtually ant external drive should work with your MBP. I would suggest one with external power so that you do not run into the same problem.
You might try a USB 'Y' connector with the one that you have purchased. That may allow sufficient power for it to operate. This is an example:
http://www.newegg.com/Product/Product.aspx?Item=N82E16817998124&nm_mc=KNC-Google Adwords&cm_mmc=KNC-GoogleAdwords-_-pla-_-SSD%2f+HDD+Accessory-_-N82E16817998124& gclid=CPSg2Y7EgrcCFccx4AodvycAyg
Ciao.

What external hard disk will work on both windows and mac?

I need to buy a hard disk that will work in both mac and windows. i live in India and will buy it from ebay.in
Can you please suggest a 2 TB hard drive (external)

best options for the price, and high quality HD:
Quality 1TB drives are $50 per TB on 3.5" or $65 per TB on 2.5"
Perfect 1TB for $68
http://www.amazon.com/Toshiba-Canvio-Portable-Hard-Drive/dp/B005J7YA3W/ref=sr_1_ 1?ie=UTF8&qid=1379452568&sr=8-1&keywords=1tb+toshiba
Nice 500gig for $50. ultraslim perfect for use with a notebook
http://www.amazon.com/Toshiba-Canvio-Portable-External-Drive/dp/B009F1CXI2/ref=s r_1_1?s=electronics&ie=UTF8&qid=1377642728&sr=1-1&keywords=toshiba+slim+500gb
2.5" USB portable High quality BEST FOR THE COST, Toshiba "tiny giant" 2TB drive (have several of them, LOT of storage in a SMALL package) $117
http://www.amazon.com/Toshiba-Canvio-Connect-Portable-HDTC720XK3C1/dp/B00CGUMS48 /ref=sr_1_4?s=electronics&ie=UTF8&qid=1379182740&sr=1-4&keywords=2tb+toshiba
*This one is the BEST portable external HD available that money can buy:
HGST Touro Mobile 1TB USB 3.0 External Hard Drive $88
http://www.amazon.com/HGST-Mobile-Portable-External-0S03559/dp/B009GE6JI8/ref=sr _1_1?ie=UTF8&qid=1383238934&sr=8-1&keywords=HGST+Touro+Mobile+Pro+1TB+USB+3.0+7 2 00+RPM
Most storage experts agree on the Hitachi 2.5"
Hitachi is the winner in hard drive reliability survey:
Hitachi manufacturers the safest and most reliable hard drives, according to the Storelab study. Of the hundreds of Hitachi hard drives received, not a single one had failed due to manufacturing or design errors. Adding the highest average lifespans and the best relationship between failures and market share, Hitachi can be regarded as the winner.

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I am planning to buy a new Mac mini. However I intend to upgrade the hard drive, i.e. buy a 320GB Mac Mini then remove the hard drive and replace it with a better one.
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specs: http://www.wdc.com/global/products/specs/?driveID=905&language=1
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specs: http://www.wdc.com/global/products/specs/?driveID=685&language=1
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Questions this arises: if the Scorpio Blue fits in, then will the Black be loose because it's thinner?
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Thanks!
Message was edited by: aaSwebmaster

6 MONTHS LATER/UPDATE.
I got the the Seagate Momentus® XT 6Gb/s 750GB Solid State Hybrid Hard Drive. Was able to install it myself in the Mac mini; it works great! (now).
My original 350GB was near full and taking almost 5-minutes to load.
Now my computer boots up in under one minute. Big difference!
Apps also snap open quickly, all functions fast and with 8GB of Ram using my computer is fun again.
Note: Initially I just made a clone of my old HD to the Seagate before taking my old HD out. This did make a bootable volume but funky and eventually the mouse clicks took 4-5 minutes to work!?
So I wiped the Seagate clean, did a new/fresh install of my Mac OS onto it and then used the Apple Migration Assistant app to get all my apps and data over - This worked and no funky stuff developed.
It's the best change to my computer in years. Feels great...and besides the features of the fusion-sytle hybrid drive (SSD & regular) I got 450GB of new, extra space...now I can put my work aside for awhile and try out one of these 12GB games!. Rock on.
INSTALLATION INSTRUCTIONS: patience, patience, patience and instructional video at OWC; yet the insides were different, an extra plastic 'cage' around the HD. Just be careful & alert.

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My computer is full and I need to remove movies and tv shows out of itunes and save them in an external hard drive. I cant figure out how to save them so I will be able to access them again. Or store them in the cloud

Do not store them in the Cloud. It isn't really storage. For iTunes purchases, for example, it is just re-downloading a purchase. If a label decides to no longer make the item available it will disap[pear from the cloud and that will be it for you.
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Hi Bluedrake
Please download the CS6 Trials from below link : Download Adobe CS6 Trials: Direct Links (no Assistant or Manager) | ProDesignTools
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That would indicate a problem with the external drive.
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No it does not, sorry that this responds took so long

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Hi:
I have a Mac Pro and I'm planning to work with HD. What external hard drive should I use?
PD: I have a NVIDIA on a PCI Express graphic slot.
Thanks,
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Intel-based Macs: Resetting the System Management Controller (SMC)
1. Shut down the computer.
2. Unplug the computer's power cord.
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What external hard drive will work for my 2012 mac book air

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