Recently I bought my first external G-raid mini hard drive for my iMac 2010, OS X Yosemite. I wanted to use time machine to back up my internal HD by using my EX G-Raid. Below is a screen shot after my first complete back up on my G-Drive: My external drive is making too much noise, its in Raid 1. I need my photos to be backed up more than anything, not 'other' whatever that is I don't know. How can I change what my external is backing up? Or what Time machine chooses to backup? I didn't get any options!