Before you can use the drive, you'll have to create (a) partition(s) and format it/them. Personally I just pop in the Windows XP CD and when it prompts you where to install (options include creating a new partition, deleting a partition, and using an existing partition), choose to create a new partition on the new HD. Continuing on it will ask you to format the partition...if you want security and performance, choose NTFS, but if you want networking or dual-booting wil Windows 9x/ME choose FAT32. After it's done formatting, cancel out of the installation of Windows and reboot. At that time your hard drive should be fully usable.
Other options include software such as Partition Manager. It will allow you to create a new partition and format the drive directly from Windows, and offers much more advanced functionality, but the demos are limited. In your case, though, it should be fine.
Hope this helps,
My operating system is XP sp2. My hard drive is Western Digital 40 GB.
I just started working with video editing, and need a large storage for the heavy files. I installed Western Digital 1200 JB Se. I've tried the jumper as 'cable select' (as master) and as 'slave'. In both configurations, the OS recognizes the new drive. I can find it in the 'manage discs' on 'my computer'. It all shows that the drive is working fine, but it is 'unallocated'. There is no letter asigned to the drive I can't find it on windows explorer. I tried finding the drive on the bios, but there is no indication there either.
If somebody can help me with this issue, I'll be most grateful.