Two new folders appeared in My Book Live

I noticed two new folders have appeared in my mobooklife drive called Time Machine and Time Machine backup. I googled a little about them but could not find much information expect that it’s for a Mac and I only own computers with a windows operating system. I have an apple ipod that backs up to my computer when I connect it to itunes but I’ve been backing it up every day for years and these folders have just appeared randomly a few days ago. The ipod backs up to my actual computer not the external drive. 

What could have caused these folders to appear and is it safe to continue backing up my computer and copying/moving files over to My Book Live?

Hello and welcome to the WD Community.

Sounds like some one with a Apple computer log in into your network and their time machine app created the folders.