Re: Computer reading External HDD
To further what Crast said, PCs don't read HFS+, which is the Mac format.
Also, Macs can read, but not write to NTFS.
You are stuck with FAT32, which doesn't allow files bigger than either 3 or 4GB (I don't remember).
Re: Computer reading External HDD
Also, Macs can read, but not write to NTFS.
This is only partially true now!
http://macntfs-3g.blogspot.com/
The only 'downside' is that NTFS-3g is pretty slow. You can't exactly play games off an NTFS-3g drive but it's very stable, and won't corrupt any files; so for using as storing data/media/backup this is by far the best cross-OS solution.
If you use NTFS, you can plug the drive into any win2k/XP/vista PC, and it works fine read-write. You can plug it in to any mac, and access it read only. And if you plug it into a mac with NTFS-3g, you can read-write.
You are stuck with FAT32, which doesn't allow files bigger than either 3 or 4GB (I don't remember).
It's tough to find a system to properly format FAT32 on such a large drive, also. Windows XP / Vista refuse to format FAT32 on drives >32gb (or was it 64?) Either way, it's way less than 500. You can do it with special partition tools, though.
Either way, I would not recommend FAT for anything but portable memory sticks and other small <30gb partitions; the filesystem has some rather undesirable properties at large sizes like very slow block allocation and lookup (it just wasn't well designed for handling such large partitions, even if the spec technically supports it)
Re: Computer reading External HDD
start, run
format D: /FS:NTFS
Where D is whatever the drive is.

Re: Computer reading External HDD
So does no one have an answer? Every google search I do always refers to a drive letter, which mine just doesn't have. Trying to reformat gives an error, and nothing I do changes that.
You probably need to overwrite the partition table. To do this, you may need to find a windows tool to low-level format the drive. That or pop it back into the mac, go to Disk Utility, and re-partition the drive with one partition in 'DOS' format, and make sure you go to advanced and select BIOS/MBR Partition Table. Then go back to the PC and go to Disk Management and format the new partition.



