Android Phones

I was going to transfer files from my phone to my PC but my Phone wouldn't show up on my file explorer, I tried another phone and my PC would recognize it, I also tried plugging my phone to another PC and the PC would recognize it only on mine it wouldn't but my PC would recognize other phones

First off i wanna say is this a good psu? https://pcpartpicker.com/part/topower-power-supply-top1000wg Is it actually 1000w? and is best of best? for Gaming? also what is better from the monitor this or this http://pcpartpicker.com/part/benq-monitor-gl2460hm vs...