How to install 2 SSD drives in a laptop that has 1 SSD slot (SSD + SSD), Asus VivoBook upgrade video

Watch with closed captions turned ON
In this video I'll show you how to add a second SSD drive (Samsung M.2) to a new laptop that already has an SSD drive - so you can keep your current SSD drive when you upgrade! I use an empty HDD slot and a SATA adapter. (Steps start at 2:50mins if you want to jump ahead.)

Note: You can also use a 2.5 inch SATA SSD drive - if you do this you don't need an adapter and M.2 SSD drive to do the upgrade. Otherwise the process would be the same (just leave out the steps with the adapter).

Equipment:
Asus VivoBook S15 S510UN, 8265NGW (8GB RAM, 500GB SSD only), 2019 model
Samsung Evo 860 SATA M.2 250GB SSD drive
StarTech M.2 NGFF SSD to 2.5 in SATA SSD adapter (SAT32M255) - many other cheap, compatible brands are available
https://www.amazon.co.uk/gp/product/B...
Xenta Precision Toolset (UK)

Optional:
8GB RAM - SK Hynix HMA81GS6AFR8N-UH Non ECC PC4-19200 2400Mhz 8GB 1.2V DDR4 Sodimm Laptop Memory (installed before video recorded, if you want to upgrade RAM too)

I use an Asus VivoBook in this guide but other models can also be upgraded in this way. You don't have to be using this specific equipment so long as the SSD drive, SATA adapter and your laptop are compatible with each other, and you have a free HDD SATA slot. Check manufacturer specs or open the laptop using this guide to see if you have free slots.

Benchmark tests showed the new drive, running via the adapter, performs better than the existing SSD that came with the laptop: http://imgur.com/gallery/FO59RXV

Note:
In the video you can see both RAM slots occupied with 8 GB SODIMMs - you can optionally expand the RAM using one of these slots (I did, taking the total RAM to 16 GB) - http://imgur.com/gallery/JDfcmFM
In the video I disconnect the battery before working on the motherboard. I recommended you do this to protect your laptop. However, the upgrade can also be done without disconnecting the battery.