@Lafong , Thank you for responding 🤝
My laptop shipped with just a 2.5 inch, 1 TB SATA HDD from Western Digital (Name: WDC WD10SPZX-21Z10T0).
The M.2 slot is empty, I attached a couple of pictures below.
Yes, all the SSDs I listed are NVMe.
In the Acer community I had asked and got to know that NVMe SSD will be supported in that slot.
I also found multiple laptops of the same model (same Board, CPU, GPU) as my laptop in UserBenchmark which had the WD SATA HDD and a NVMe SSD running concurrently.
And many were running a SATA SSD in the 2.5 inch slot (it's a combo slot for SATA HDD or SSD) and a NVMe SSD in the M.2 slot.
Compiled a list with filters in these links:
Guys, I finally upgraded my Laptop storage with the WD Black SN770 NVMe PCIe Gen4 M.2 1TB SSD 🕺 (as per a recommendation from the Editor of TechPowerUp and Tom's Hardware reviews). The Gen4 SSD works like a charm on my PCIE Gen3 board 😃 and will give some future proofing too if I buy a new laptop with PCIE Gen4 board in the next couple of years 😎
I tried to clone with Macrium first but it failed with "Cyclic Redundancy Check" error for the 7th partition, in Ubuntu Disk report there was just 1 bad sector on the HDD.
While cloning my dual boot Win+Ubuntu HDD using WD's version Acronis True Image to the SSD I got some CRC errors too but the process completed successfully. I used the Bootable image for both Macrium and Acronis to clone the HDD offline.
Win 10 booted without issues but had a minor hiccup with the Ubuntu (only the GRUB shell will show).
So checked some forums and used Ubuntu Boot-Info tool which showed the issue was during cloning GRUB was installed in partition1 instead of partition7 where my Ubuntu installation was
So used Ubuntu Boot-Repair tool which reinstalled GRUB in the correct partition and voila! 😎 My Ubuntu was back in business and Grub loaded working as before 🕺
And I tested copying two streams of data files from my external HDD to the SSD, 13 GB and 16 GB respectively, and it surpassed the max theoretical speed for 1x (lane) for a Gen3 which is 985 MB/sec... I got 1000 MB/sec top speed while copying. Copy took 123 secs and 166 secs respectively 😃