ZeeZeey

thanks so much bro

Make sure the photos for a K1 are just a trip to visit him and family and friends
good to have one of you and his mom to show the family approves
do not show any photos that can be considered as a marriage ceremony as many are denied in Nigeria for "being too married for a K1"
as for chats i limited mine to the start of our talks and a few pages in between and some current ones /not the whole chat but a few select sentences reguarding getting to know each other

Hi.  They will not read all those log sheets.  Think quality.  I would include the picture showing your ring, if you took pictures with him, friends, family, I would include those also.  You are at the I-129F packet stage & don't need extensive logs.  Your fiance can take some to his interview later.  Also, don't forget to include the letter of intent to marry, page with stamped visa, airline payment receipt, anything that shows the two of you actually met within the two years prior to filing.  Take your time & read over the entire packet to check for anything that you might have missed, & sign where requested.  You will do just fine. 

Just select a few chats. It's recommended to just include about 6 pages.

I suggest more visits...Understanding you will be starting over in regards to a job, but truth be told, they could care less..Facetime is very important to them and especially when it comes to high fraud countries..As for the age difference, I don't really see it as being an issue because I know of others with larger age gaps that got approved, but you will need to overcome that obstacle by providing enough quality evidence to prove a bonafide relationship..When it comes to countries like Nigeria and Ghana, we can't stress enough facetime..Pictures, chat and call logs are just secondary evidence, but the facetime is most important..Wishing you well on your journey!!