yes..

the octopus emerged from the water

my game crashed
ps4 phat

hmm the game starting scene, reminds me of the movie "oblivion' starring tom cruise

lonely world, a man on a bike...

Ps4 phat here as well.
the DS game is using quite a high end graphic.
maybe trying to clean your PS4?
does it keep crashing? or only once?
my game did crash when I went to windfarm area...maybe because of the trees. but only happen once.

i loaded the game again
same scene ...Crashed, but somehow this time  the game prompted message box say corrupted save file
and ask me to overwrite . press overwrite then cutscene continues,

fuuuuuuuu

then meaning it is playable la now ? 

yes
just reach the engineer
pretty slow progress
too many games to play

got nitendo switch
got mobile games
Ps4 playing COD

off topic, i notice my rear left and right corner of the top cover of ps4 pro, i can lift up the top cover by about 1mm or so. It feels loose...

i am wondering is it just my unit?
or its norm

That is completely normal. You are meant to pry the top cover off if you ever want to disassemble the console.

how to increase bandwidth? other than increase star and increase level?

you can dismantle your old structures that are no longer being used.

about that, can we toggle something on the map where we can only see our structure?
sooo confusing and need to hover 1 by 1....   

Sometime u need to read mails from these preppers to continue level up the stars.

So if u encounter preppers that their star doesn't increase, check if you have any unread mails from them, or go to your private room to trigger some mails. If still no mails that mean you need to progress the game a bit then only be able to level up their stars.

how to increase bandwidth? other than increase star and increase level?

you need advance further to chapter 5 and expand the UCA connections to more stations. Then get 5 stars to expand your bandwidth. Besides that, bridges consume 1000 bandwidth. So usually I will dismantle all my bridges and safe house (if you have) to free up my bandwidth too.

My best suggestion is advance your main mission to episode 8 to expand more bandwidth. Maximum is more than 40k bandwidth if you successfully unlock all the hidden delivery stations and max them all to 5 stars. Don't worry, as long as you don't proceed to episode 9, you are still safe to build ziplines and roads in episode 8. So everything you need to do, such like unlock gears, weapons and structures. Please do it before you proceed to episode 9. After you reach to episode 9, the story will be getting linear and no more open world sandbox.