Kim with the purple hair

I’m looking at buying a big external hard drive like the Western Digital cloud. I need something big at least 6-8TB (I have a lot of photos and video) but I’d like it to be mirrored for extra protection. I wondered if you had any recommendations please? I'm a bit limited funds wise but my phone and MacBook and two external hard drives are all full so need it sooner rather than later in case something fails. thank you