Help converting to GPT

[whalewithdowns7]

Hi. I just purchased a 3tb hard drive and a copy of Windows 7. I swapped the HD's, booted up from the disk and installed Windows. Everything worked fine, except I am only using 2 tb instead of around 2.75. I was told I need to switch the file format to GPT, but I am having trouble doing that. I have already formatted the drive, but still can't do it the way all the videos say to do it (through disk management). If it makes any difference, I am currently running Vista and am on my original HD. Thanks

 

[nukemaster]

The drive has to have NO partitions on it to make it GPT.

Some users have better luck using a linux live cd/dvd/usb flash drive to format the drive in gpt.

 

[ThomasJ93]

If you wish to make this your boot drive, your motherboard will have to support UEFI. If it doesn't, you will not be able to use the full 3TB and also boot from it.