Partitioning Easystore Drive

I just purchased an Easystore drive. I have to computers I would like to backup to this drive. I would like to partion the drive in two if possible and store my data from each computer within their respective partitions. Is this possible? If yes, how do I do it?

If not, any better suggestions?

For windows use this https://www.pcworld.com/article/2066191/how-to-partition-a-hard-drive.html
For Mac use this https://www.imore.com/how-to-partition-your-mac