process system isn’t responding samsung note 4

I rooted my Samsung Note4 32 GB and it was working with no problem till I was messing with Link2SD and I did something stupid don't know what is it then
my phone kept popping up these two messages :

"process system isn’t responding" and "unable to open Gallery"
I already do this..
Setting --> Application Manager --> External Storage and Media Storage and clear data and cache on each one and reboot
Then Wipe the phone cache and wipe data and factory reset
Still no joy
When I connect my phone via USB cable to my laptop phone storage shown as 127 MB while internal storage is 32 GB

anyone help me. advance thank you!

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