Try this site for an explanation:-
https://www.howtogeek.com/254830/why-your-photos-dont-always-appear-correctly-rotated/
Cheers,
Andrew
Hi Jsy
What I do is go to edit my pictures and rotate 4 times anti clockwise so its portrait and then upload...seems to work for me okay
Hope it helps
Nap
I use a Mac so will have to investigate where to locate this.