I'm currently using this with my G5 Plus: https://www.amazon.com/gp/product/B01GO07YNU/ref=oh_aui_detailpage_o04_s00?ie=UTF8&psc=1&tag=hawk-future-20&ascsubtag=UUacUvbUpU6051635
I have it installed between the phone back and a fairly bulky case and it works fine. Not as fast as the included...
I'm in the same boat as you, thinking of upgrading from a G3 to G5 Plus. I was able to find this comparison:
Motorola Moto G (3rd gen) vs. Motorola Moto G5 Plus - GSMArena.com
I use the Gmail app for Gmail, Hotmail, AOL and Zoho. My AOL mail account show a "Junk" folder that contains AOL's spam. Try deleting the AOL account and reinstalling it.
Any time I want to transfer something from my PC to the N7 I have to uncheck MTP and then recheck it. As soon as I recheck it the PC sees it. This is with the original N7 cable.