Step 1: Make sure your external hard drive is attached and mounted to your Mac. Step 2: If you have already written any data to the drive, back it up before proceeding to the next step. Step 3: In the Finder, choose Go, then choose Utilities. How to Format a Hard Drive for Windows. To format a hard drive for Windows, open the File Explorer and click on This PC. If the hard drive you want to format is connected to your PC, it should be there. Right-click on it and select the Format option from the context menu.

I am trying to reformat an external seagate harddrive for use on my windows 7 running PC. The drive used to be used on a mac so is probably in the wrong format so isn't automatically detected when I plug it into my PC.

I can find the drive using Device Manager and it says the drive is working fine, but it doesn't show up on windows explorer or my computer, which is where other tutorials say to reformat from. Any guesses as to how to detect and reformat the drive for use on the PC? (Unfortunately the old mac is now cactus so I cant just reformat from there.) Thanks a lot! Haha, i had the exact same problem and I came up with a solution. I have an external seagate 2TB USB3 HDD, I used it for my Mac and when I used it on windows, I isn't there and i can't backup but the light was on.

This is what you have to do: 1)just search format on the windows search option on start, open the program called 'create or partition hard disk partitions' 2) You will be able to see your drive in this application, right click on the unallocated space and there should be an option called format. 3)It should then format the drive to NTFS. 4)The drive will now appear in the start/computer menu. Hope this helps.

P.S, I couldn't format it from my Mac as it only formatted it or wiped it to it's MAC OS Journaled thing.

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