Can I install Windows 7 on a hard drive which used to be an external hard drive?

miba54

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Hi. I have a hard drive which I used to use as an external hard drive. It went through a lot. It's enclosure/casing is now broken and it got accidentally formatted. It still works perfectly, though. It didn't get damaged or anything like that. It's now inside the computer case. I plug it into the motherboard manually with some blue cables, that's how I use it. I put movies and other large-sized files in it.

I also have my computer's original hard drive. The OS and basically everything is installed on it. It's pretty old and I just know it's about to die on me and lose me all my data. So I was wondering if I could install Windows 7 on this better and less used hard drive which was originally an external hard drive. It's model is WD15EARS.

Would that work? Would it give me some weird errors in the Windows 7 setup, saying stuff like "This disk is blah blah blah, Windows cannot be installed on blah blah blah..." (I hate those errors. Can never get around them.)

Sorry if this is a stupid question. I'm not very knowledgeable when it comes to hard drives. Thanks in advance.
 
Solution
Get Windows install DVD. Disconnect your old drive (leave just that "external" one connected), then boot Windows DVD. If you can install it, you can use it. Once you do that, you can clone your old drive so that you don'w have to reinstall everything.

In first case, don't re-format the drive - you said you keep some data on it. On second - make a backup somewhere else.
Get Windows install DVD. Disconnect your old drive (leave just that "external" one connected), then boot Windows DVD. If you can install it, you can use it. Once you do that, you can clone your old drive so that you don'w have to reinstall everything.

In first case, don't re-format the drive - you said you keep some data on it. On second - make a backup somewhere else.
 
Solution

miba54

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Thanks.
 

neiler0847

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Mar 25, 2015
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You can put any HDD in your computer and install your operating system on it. But you may not want to. The 2.5" drives used as external drives are typically 5400 rpm laptop drives. They are slow. I recommend that only very patient people install their operating system on a slow drive :)

A much better option is to load your operating system onto an SSD, and use the old HDD as your data drive. 250 GB SSDs are less than $100, and they breathe vitality into any system. You'll be amazed.