Converting Essentials Book II from DVR use to Mac OS 10.4.11 use

Do I need to download  software to use my Essential Book 2 ( model #wd5000h1u) on my PowerPC G5 ?  What am I doing wrong. How do I reformat it?  I had used this HD to record on a DVR and now I want to change. Don’t have any information from previous use.

Connect the drive on USB, click on go> utilities> disk utility. If the drive’s good you should see it, click on it, go to partition, select 1 partition as the volume scheme, click on options and select Apple Partition Map since you have a G5, click on partition/apply.

what do you plan on using the drive for?