Hi Staudie,
According to WD, this should not be a problem:
Can I use the WD PiDrive with my own microSD™ card and OS?
Absolutely! The WD PiDrive is a USB hard drive and can be used for external storage on the OS of your choice, but it must first be partitioned, formatted, and mounted. Detailed instructions can be found on wdlabs.wd.com/community.