Trouble with internal memory - unlocked Galaxy S7 64GB - originally T-Mobile phone

I am new to this forum and likely one of hundreds who bought a used phone with troubles.

I purchased what shows to be an unlocked Galaxy S7 64GB (64GB marked on the back of the phone) - Model SM-G930FD - originally T-Mobile.

The phone looks immaculate and shows no physical signs of being opened or tampered with.

I have not put in a new SIM card or taken the phone to be activated on my plan yet. I did put in a 128GB micro card. (Q- I don't assume putting in a SIM card would resolve any of the below issues?)

In settings the phone shows to have 32GB (not 64) internal storage and recognizes the MicroSD card, but when I connect it to my computer the internal storage only shows 17.5MB available... So obviously when I tried to load the Chrome browser (40+ MB) I got an insufficient memory message. I was hoping it was just reading the available storage wrong.

When I look at Storage under settings it shows that the phone has 32GB internal and 28.15GB available, and it shows 125GB available on the SD Card.

Some of the other info from my About Phone page:

Android Version 6.0.1

Kernel Version:
3.18.14-7162483
dpi@SWHE2615 #1
Wed Aug 17 21:29:07 CST 2016

Build number
MMB29K.G930FXXU1APB6

SE for Android status
Enforcing
SEPF_SECMOBILE_6.0.1_0004
Sat Feb 06 12:08:15 2016

Hardware version
MP 1.000

I tried resetting the phone and erasing all data and it is still the same.

Phone comes on and seems to run fine.

So before I put it up on eBay to get rid of it - is there anything I can do to try to release/recognize the internal storage??

Thank you in advance!!

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did you get anything on your problem. iam having the same problem here

plz help