Samsung Galaxy S5 bypass Lockscreen

I read another thread in the developer forum. I'm a newbie so if I'm in the wrong place please redirect me.

Long story short, I forgot my password on my Samsung Galaxy S5 (SM-G900V) and I was using the above thread to work through bypassing the lockscreen without losing all my data.

This phone is not rooted nor have I installed a custom recovery. I'm going into the Android Recovery Settings (using Method 7 see thread above).

My steps:
1. I downloaded the file to a SD card
2. Entered Android Recovery Mode
3. Chose Mount/system
4. Apply update from SD card
5. Picked file mentioned below

I get the following message:
E:footer is wrong
E: signature verification failed
Installation aborted.

I've tried installing the file 2 or 3 times. I've downloaded the file again from scratch, and tried to install. All without luck. Does anyone have any idea how I can get past this? End goal is I don't want to lose my data, and I want to be able to bypass my passcode screen.

Thanks so much!

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