Reformatting a Windows Format HDD

whitel4 said:

Can someone help me!! I have several external HDD. One I use only for my iMac and is MAC formatted which is fine. But Others I have had from my Windows days that is read only on my iMac because its formatted to Windows NT.

Can I format these to use on both Mac and Windows? If so, How?

Click to expand...

Step by step. You can do this on the Windows machine or your Mac:

http://cnettv.cnet.com/8301-13415_53-10286826-11.html

whitel4 said:

Can someone help me!! I have several external HDD. One I use only for my iMac and is MAC formatted which is fine. But Others I have had from my Windows days that is read only on my iMac because its formatted to Windows NT.

Can I format these to use on both Mac and Windows? If so, How?

Click to expand...

If they are NTFS you can normally only Read on OS X by default, if you use a 3rd party solution like Paragon NTFS Driver for Mac it can Read/Write to it, you might look into it, there are a few more which do the same but overall Paragon seems to be the best choice.
Or, you can Format them as ExFAT, you can use for normal Data but you can not make a bootable HD on this format, you can use TimeMachine though since it will create an Image on the disk which is a file.

Macman45 said:

Step by step. You can do this on the Windows machine or your Mac:

http://cnettv.cnet.com/8301-13415_53-10286826-11.html

Click to expand...

ExFAT would be better, FAT32 has a 4 GB Limit, but you know this.