Save a randomly generated terrain to game file

Hello!
I am currently working on a 2D Minecraft-esk game as a learning experience. I have gotten rather far on my own but I have gotten stuck on how to save my map (Blocks and player position). I created a random block generator (It’s a bit of a mess, I know, but it works) The issue I am having is saving the prefab copies to a save file without the terrain regenerating on me every time. With all the save methods I have tried every single one just regenerated the terrain.

Bonus Info:
I have the terrain generation script attached to my player so as soon as the player is rendered the terrain randomly generates.

`using UnityEngine;
using System.Collections;

public class blockSpawn : MonoBehaviour
{
%|-1446747765_1|%
public GameObject Grass;
%|903217905_3|%
%|136237991_4|%
%|-1251951135_5|%
%|-1426623343_6|%
%|-2065649517_7|%
%|-1819742777_8|%
%|1906837029_9|%
%|-1986051694_10|%
%|1651827282_11|%
%|-1108236652_12|%
%|670030102_13|%

%|-2029995424_14|%
%|602125092_15|%
%|-1586535938_16|%

%|-1923784418_17|%
%|-1864907346_18|%
%|2135106283_19|%
%|-1141352543_20|%
%|-102703709_21|%
%|1590346120_22|%
%|467579366_23|%
%|-2115044570_24|%

%|-397939301_25|%

%|2140486734_26|%
%|-1756250263_27|%
%|-1587411223_28|%
%|686911334_29|%

%|-1137264129_30|%
%|-1738760240_31|%
%|1299188956_32|%
%|-1179186729_33|%

%|-1930294853_34|%
%|1411423665_35|%
%|366522794_36|%
%|-955403629_37|%

%|-1381109886_38|%
%|209607248_39|%
%|46396959_40|%
%|-335559266_41|%
%|554706497_42|%
%|-99270313_43|%

%|2053780166_44|%
%|435716658_45|%
%|-1615331825_46|%
%|823788486_47|%
%|1405987283_48|%
%|-2130050861_49|%
{
x = 0;
%|23122755_52|%
%|-1974208865_53|%

%|-898427287_54|%
%|-730124794_55|%
%|-293419199_56|%

%|969071082_57|%
%|804195557_58|%

%|-698426720_59|%
//End of Update

}`

You don’t want to save prefabs directly, neither of level nor your player object.
Unity doesn’t natively support any savegame mechanics, but you can write your own.

Basically, you need to extract some data from your game, write it into a file, and later be able to load this data and recreate your game. You don’t write entire prefabs, just all data needed to recreate it (and link it back to the game).

A robust automatic system (that utilizes reflection) might take some time, but you can put something simple together rather quicky.

If your level is a simple 2D array of blocks, you could just write:
dimensions of your level
one byte per block of your level (byte defining a type of the block)
Write this data using System.IO library
When reading, simply follow the same steps but reversed:
Read level dimensions; Then read through the block data, recreating blocks in your game